Beginner Blender VFX Tutorial Greenscreen - Masking!

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  • Опубликовано: 4 дек 2024

Комментарии • 383

  • @CGGeek
    @CGGeek  6 лет назад +35

    Just wanted to give everyone a heads up! - While this tutorial still works great for Blender 2.79, if you are using Blender 2.8 I have a new updated tutorial here: ruclips.net/video/5ZpGpfQjzJA/видео.html

    • @michaelsmusicinstruments9980
      @michaelsmusicinstruments9980 5 лет назад +3

      thank you for the update

    • @bimosetyawan7750
      @bimosetyawan7750 5 лет назад +3

      Hi mr.steve thank you tutorial it`s so easy

    • @managang3840
      @managang3840 4 года назад +1

      Bro what is the software name

    • @knit-
      @knit- 4 года назад +1

      MANA GANG uhh

    • @zaydengianni6506
      @zaydengianni6506 3 года назад +1

      i know Im kinda randomly asking but do anyone know of a good place to watch new series online ?

  • @PotatoMaGobinus
    @PotatoMaGobinus 2 года назад +5

    I saw this video when I was little and THIS is actually what inspired me to be a VFX artists and I'm still doing it till this day hoping to get into a studio, I doubt anyone will see this but thanks for the inspiration man:)

  • @gamedreamerjjg
    @gamedreamerjjg 8 лет назад +7

    I've been learning more and more about blender and I had no idea it could do this. This is awesome.

  • @AlimayoArango
    @AlimayoArango 10 лет назад +41

    I have done a decent amount of green screening in Blender. I did not know what or how to use the garbage or core setting on the keying node.Now because of you and this excellent tutorial I do.
    Thank you very much for this tutorial.

    • @ttemplesling203
      @ttemplesling203 10 лет назад +2

      Dude really? you make all these videos that say "Blender tutorial" . Then you spend 1/2 the time talking about Adobe or something and how you have to change the keys around in blender to fit your style and be like "after affects."
      You make a video (20 minutes long) on the same subject that leaves viewers scratching there head and saying "wtf". Now 6 months later your like, "thanks
      Blender Steve for teaching me about green screening." Here's a free tip, to make Blender tutorial keep it about Blender (not other programs). Oh, and it helps to know what your talking about.

    • @blizzerd2094
      @blizzerd2094 4 года назад

      I didn't knew CG Geek is your online teacher, I mean you are a youtuber either?

  • @FelixLarios1234
    @FelixLarios1234 6 лет назад +76

    I don't have a computer
    Edit, it’s been 3 years I have a computer now

  • @jamespfp
    @jamespfp 9 лет назад +2

    Great video, short yet detailed enough to give a good idea of how to work with masks and chromakeying. Question though --- is there a way of using the compositor nodes for keying in conjunction with the video sequence editor?

  • @poooppoijgfjhg8877
    @poooppoijgfjhg8877 9 лет назад +139

    Well you didn't tell us how to put the image in the background!

    • @CGGeek
      @CGGeek  7 лет назад +38

      Posted this a few times already in the comments, Just connect an Alpha Over node to the end of your nodes, and connect your background image in the top slot. Voila!

    • @domo201
      @domo201 7 лет назад +74

      CG Geek
      Damn bro you replied one year later lmao

    • @adnansamol8464
      @adnansamol8464 7 лет назад

      yeah

    • @GilFavor101
      @GilFavor101 7 лет назад

      +Domo It happens. lol

    • @Lopezjava1999
      @Lopezjava1999 7 лет назад +1

      Active the "Backdrop"

  • @beachdancer
    @beachdancer 9 лет назад +2

    Very useful. I had been struggling with green screen and had no idea that this quality was possible. (I had been running the raw footage directly into a green keying node and couldn't figure out why there was no 'garbage matte' node available.) I had no idea that you could create a tracking matte as a mask.
    So many hidden places in Blender.

  • @Krasniysharigg
    @Krasniysharigg 4 года назад +1

    This is the best keying tutorial (thanks for saying hotkeys)!

  • @mikelancer4100
    @mikelancer4100 10 лет назад +4

    Exactly what I was looking for

  • @eveangeline1023
    @eveangeline1023 5 лет назад +2

    What software do you use? I'm new at this.

  • @MichaelAdepoju
    @MichaelAdepoju 7 лет назад

    Sweet, lovely and beautiful. I can't wait to start using it.

  • @therealsteelie
    @therealsteelie 10 лет назад

    Great work. Keep the videos coming.

  • @pepepemariano
    @pepepemariano 8 лет назад +1

    thanks for the tutorial! will you be doing more vfx tutorials in the future?

  • @GaryFlyerFilms
    @GaryFlyerFilms 9 лет назад +2

    Thankyou for responding so quickly!!
    I had my actor jump off of a bed that had a green-screen over it. We just need to key in our behind footage. With the nodes I'm already using, what would be the nodes I want to use to key out the green and bring in my background image?

    • @CGGeek
      @CGGeek  9 лет назад +1

      YFTS ! If your shot was locked down on a tripod, you can just use an Alpha Over node and connect your character after green screened to the bottom socket, and your background to the top socket.

  • @ohshootshoot5448
    @ohshootshoot5448 7 лет назад +1

    Oh girl this video got me shooketh because girl I tried to make this video, it didn't work, but girl I persisted, look at me now. I am Beyonce of all technology. I liked this video so I put a ring on it.

    • @zaraazhar2716
      @zaraazhar2716 7 лет назад

      OOooo gurllllllll the same thing happened to me, what a C-O-I-N-C-I-D-E-N-C-E

  • @djinnestudio1876
    @djinnestudio1876 5 лет назад

    Hay gente que poniendo cualquier tipo de excusa pretende cobrarle a la gente mucho dinero por enseñarles a manejar Blender....aunque no sean en mi idioma sus vídeos, los entiendo mas o menos...Gracias por enseñarnos libremente a manejar Blender de manera profesional.

  • @OKPRODUCTIONSofOmKumarRai
    @OKPRODUCTIONSofOmKumarRai 6 лет назад +1

    Hi sir according to you which animation software is best "MAYA" or "Blender" and why?

  • @Lensbreak
    @Lensbreak 8 лет назад +3

    cool but Keylight in AE is still more handy

  • @Video-by6lp
    @Video-by6lp 6 лет назад

    Very good, Thank you man !

  • @igotderp7113
    @igotderp7113 8 лет назад +9

    How did you change the background?!?! How did you put the mask in a scene made in blender!?!?!? PLEASE make a tutorial on this!

    • @mukeshsen2644
      @mukeshsen2644 4 года назад

      Just connect an Alpha Over node to the end of your nodes, and connect your background image in the top slo

  • @HARDstone3d
    @HARDstone3d 6 лет назад

    Cool video! Have you tut about how you made video at the and? I am wondering how to positioning 3d wall on place of real wall etc...

  • @obewankenobi785
    @obewankenobi785 9 лет назад +7

    Hey how did you make the background move with the mask?

  • @mjparent222
    @mjparent222 8 месяцев назад

    Thank you for the footage !
    i use it for a little compositing of my own on Nuke non-commercial.

  • @smallmusic-smyofficial3913
    @smallmusic-smyofficial3913 5 лет назад

    Thank you teacher

  • @SpencerMagnusson
    @SpencerMagnusson 10 лет назад

    Great work, and saved me on one of my green screen issues! Thanks!

  • @halali9847
    @halali9847 7 лет назад +1

    Is there a tutorial how to compare the footage with the animated background (reflections, ambient occlusion etc.)?

  • @GaryFlyerFilms
    @GaryFlyerFilms 9 лет назад

    Great video! I'm pretty new to Blender....so what comes next? Do I render this alone? Or do I do the green-screening in this same file?

    • @CGGeek
      @CGGeek  9 лет назад

      YFTS ! You could do either! there's always more than one way to achieve something, its all going to depend how you need it.

  • @kikesahagun
    @kikesahagun 8 лет назад

    Thanks man, saved my life!!

  • @MyHeartBeatsBackwards
    @MyHeartBeatsBackwards 5 лет назад +6

    me trying to learn vfx.So here are some TIPS..
    😅!!!

  • @Maninawig
    @Maninawig 6 лет назад

    If the green screen you want to remove is an extra helping you in a morph suit (say you're doing a martial arts battle and want to look like you're jumping on air), then can you use the whole clip as a mask to do the same? (Using a still shot of your scene without the actors as the fill)

  • @Luxxer
    @Luxxer 9 лет назад

    Very helpful, and I really like the short film

  • @ttbooster
    @ttbooster 8 лет назад +6

    I followed your steps but when I click the "Animation" button, it just renders the movie clip.. how do you animate the result to a video?

  • @nilsgensert5814
    @nilsgensert5814 7 лет назад

    Are you using any Plugins? because your Keying-Node has WAY more options than mine, one of them is Matte inputs (I only have a Matte output) and Feathering.

  • @alessandro_lima_vfx
    @alessandro_lima_vfx 10 лет назад

    Great tutorial. I wonder how to put the video back to "video editing" so I can enter the other elements of the finished movie. Can you give any tips?

    • @CGGeek
      @CGGeek  10 лет назад

      Once your footage is masked and Chroma keyed, you can drop any background behind it with the alpha over node. Then just render it out as a quicktime animation.

    • @alessandro_lima_vfx
      @alessandro_lima_vfx 10 лет назад

      I think I din't explained myself well. In Video editing mode I have full control of transitions, positioning and so on.
      I wonder how to use a "un-green" screen with others imagens, movies, audio as a part of the clip, like VSDC Editor, for example.

    • @CGGeek
      @CGGeek  10 лет назад

      ***** So are you asking how to use your finished footage in the Sequence editor? or how to use the Sequence editor?

    • @alessandro_lima_vfx
      @alessandro_lima_vfx 10 лет назад

      I found a workaround. I've created a file in blender to remove the green background and then I save the video with an alpha channel. Then I import the modified video in blender ina new project and it behaves as a regular video. I hope next versions of blender makes this process easier.

  • @knit-
    @knit- 4 года назад

    your children are wholesome

  • @gudgyo
    @gudgyo 9 лет назад

    Hey, great tutorial! Where can i find your camera data for motion tracking? Thanks for your answer in advance!

  • @joeplayjoekeys9579
    @joeplayjoekeys9579 7 лет назад

    Hi CG GEEK, pls is it possible to light up a greenscreen to generate shadow or is it possible to get the shadow of a green screen object when u light it in blender? Thanks

  • @dreamingacacia
    @dreamingacacia 10 лет назад +3

    Mono Background
    here is the video that I did with your footage and great tutorial
    if there is some mistake about publishing please tell me
    for anybody who cannot key the man
    please see your fps that set in render property
    select the one that match the video
    for this video I set at 29.97 (so I got this problem in the first time)
    so I will try more and practice on my own work later
    respected

  • @saddlebroncSilver
    @saddlebroncSilver 8 лет назад

    hey brow, I need a help, I'm looking to creating a stop motion animation with toys, but I was thinking use green screen on stop motion then use another software to create the background scenery, so how could I take stop motion animation in green screen and import to blender the in blender create the background scenery to stop motion animation, so le't try simplify the question, take the stop motion animation done in green screen import to the blender then in the blender create the scenery, could help me how could I do it please, thanks.
    PS: I would like to know what tools on the blender I should use to create the scenery for the stop motion animation ( the stop motion would be made using toys, like spiderman, super man etc....

  • @joeyprice301
    @joeyprice301 7 лет назад +1

    How do you make the background, do you have a good n00b tutorial on that you can point to?

  • @MMchannels
    @MMchannels 5 лет назад

    Nice topics

  • @harryalpert8002
    @harryalpert8002 4 года назад

    effing great! thanks!

  • @drumgal91
    @drumgal91 10 лет назад

    Any tips on using masking to change the eyes?

  • @shannonjensen3855
    @shannonjensen3855 10 лет назад +4

    Thanks for taking the time to share this! I made sure to watch the ads so you'd get something back for your kindness. I learned a great deal - one wish-comment. There were several times when you didn't say which shortcut key you were using to make things happen on the screen.
    For example, moving and rotating the mask - I went out and searched the internet for some time without much success and finally thought, I'll just watch ahead and hope he tells us later. Sure enough - you did go on later to say "A" for select all and "G" for move. Then, still later, you explained "R" for rotate. I know those shortcuts are probably so second nature to you that you likely don't even think about doing it anymore, but it would be a HUGE help if you'd make sure to let us in on those shortcuts too.
    Again - thanks so very much for these tutorials!!!

  • @j-tech2647
    @j-tech2647 5 лет назад

    Subscribed for your videos bro👍😘😘😘

  • @weirdosheep9296
    @weirdosheep9296 9 лет назад

    Stupid question, but... I've been trying to render a greenscreened clip while still keeping other clips in the video editor timeline... is that possible? I feel like I'm overlooking something really obvious...

  • @michalipka4755
    @michalipka4755 3 года назад

    Hi small thought of camera tracking. I saw somebody using HTC Vive Tracker device to track the realworld camera to move virtual camera in Unreal Engine. I wonder if it is also possible in blender. Can you attach HTC Vive Tracker to your camera which you use on greenscreen and record its moves to use this for virtual camera position in blender?

  • @PaulMatematechapa
    @PaulMatematechapa 6 лет назад

    i watch your video till the end thank you

  • @maker898
    @maker898 9 лет назад +1

    could you please explain how to add the background video it would be very helpful!
    ps: very good tutorial:)

  • @abdulsalman1439
    @abdulsalman1439 10 лет назад

    superb explaination

  • @robotrannicthesurprisingly9085
    @robotrannicthesurprisingly9085 7 лет назад

    for anyone wanting to add a background image render your green screen part then use the video editor to overlay on a back ground image

  • @jamesesl1
    @jamesesl1 10 лет назад

    Great lesson. But for some reason, my mask is covering the whole area although I've completely covered my character and connected mask. I'll study this more!

    • @jamesesl1
      @jamesesl1 10 лет назад

      One thing I've noticed is the mask works fine on your mov video file, but not my m2t files. I'll experiment further.

    • @jamesesl1
      @jamesesl1 10 лет назад

      James' ESL
      The 3rd fact I've discovered is the mask is working however, the size of the mask wrong and doesn't match size from the motion tracking window.

    • @CGGeek
      @CGGeek  10 лет назад +1

      James' ESL
      This is probably because you didn't set the resolution in the Outliner to be the same as your footage.

    • @jamesesl1
      @jamesesl1 10 лет назад

      Well I'm pretty sure it's 1920 by 1080...but let me see. Hmm...that might be right. I see windows folder info is calling it 1080 by 1440. I'll have to try with those settings. A good question, did you do a tutorial on the integration of your 3d world with this keyed footage? Thanks for the speedy reply too. I find keylight in after effects to be much easier to work with.

  • @maximyurin1205
    @maximyurin1205 9 лет назад +6

    Very nice tutorial, but I have one question left. How do I get Background images or vids in there?

    • @mastermind6043
      @mastermind6043 7 лет назад +2

      Just connect an Alpha Over node to the end of your nodes, and connect your background image in the top slot. Voila!

  • @joshstone7340
    @joshstone7340 9 лет назад +15

    and how do we add in the movie afterwards???

    • @mastermind6043
      @mastermind6043 7 лет назад +2

      Just connect an Alpha Over node to the end of your nodes, and connect your background image in the top slot. Voila!

  • @savinbabu3856
    @savinbabu3856 6 лет назад

    Which software are you using

  • @Jordufi
    @Jordufi 7 лет назад +2

    you are a genius

  • @sheynaddy.4835
    @sheynaddy.4835 5 лет назад

    Amazing work there.
    Pls I want my PC animate very fast as yours because mine is very slow in blender.any idea will help a lot

    • @justforthesakeofthispurpos1288
      @justforthesakeofthispurpos1288 5 лет назад

      Hey! Your pc's fastness will depend heavily on your processor, your integrated/dedicated graphics cards, your installed ram, as well as your boot drive. Your render time will depend on your GPU.

  • @Calling321
    @Calling321 10 лет назад

    Very cool

  • @codekiran3074
    @codekiran3074 8 лет назад +4

    How to change the backgroud?It is very importent!!

    • @szymon170able
      @szymon170able 8 лет назад

      You can change it in Blender VSE

    • @mastermind6043
      @mastermind6043 7 лет назад

      Just connect an Alpha Over node to the end of your nodes, and connect your background image in the top slot. Voila!

  • @shivammanshareshivammansha9812
    @shivammanshareshivammansha9812 6 лет назад +1

    Please you make video on cobra snake how to move one place to another place in blender

  • @iggy35
    @iggy35 6 лет назад +1

    Good vídeo :)

  • @uddhavvegad8440
    @uddhavvegad8440 9 лет назад

    how do to add the picture and falling down and placement setting plz tell .. i am new in blender i need ur help plz reply

  • @nathanielvandeursen6767
    @nathanielvandeursen6767 10 лет назад +14

    how do you add a background image?

    • @mastermind6043
      @mastermind6043 7 лет назад +1

      Just connect an Alpha Over node to the end of your nodes, and connect your background image in the top slot. Voila!

    • @zevac
      @zevac 7 лет назад

      MasterMind lol this fucking guy

    • @ardianosmani3482
      @ardianosmani3482 7 лет назад +1

      MasterMind copy and paste haahha

  • @TheGamingPig100
    @TheGamingPig100 9 лет назад

    Hey CG! I know it's a bit late to comment so I hope you see this but I don't know how to connect my background image to alpha over to add a backdrop. I put the green screen vid on the bottom and the backdrop pic on the top after doing everything in your tutorial. It won't work so please help. :)

  • @Luxxer
    @Luxxer 9 лет назад

    Nice vid dude

  • @drblueddad
    @drblueddad 6 лет назад

    Wait is this only in a pro version?

  • @sarojrijal1472
    @sarojrijal1472 9 лет назад

    you are just teaching us of masking but. what about background ?how do you change it?

  • @virtueisdead
    @virtueisdead 9 лет назад +4

    My mask dosn't work. i came here for help with that.... UUGHHH. for some reason the color on my mask wont show up nomater what i do! It just says black!

    • @johngddr5288
      @johngddr5288 9 лет назад

      +Pierce Burbank mine too ;n;

    • @mohamedatef9688
      @mohamedatef9688 9 лет назад +2

      +Pierce Burbank change the "screen size" option in the mask node .

    • @sirpixelot8853
      @sirpixelot8853 7 лет назад +1

      Did you try checking the 'Use Alpha' box on your viewer and/or composite?

    • @MrTreezNW
      @MrTreezNW 7 лет назад +1

      Thank you

  • @robertone6602
    @robertone6602 9 лет назад

    Hi! :) first of all, thank you!
    than, how did you created the elements of star wars? did you modeled it?

    • @CGGeek
      @CGGeek  9 лет назад +1

      Alessandro Abbruzzese Your welcome! Yup all modeled.

  • @robthorn3910
    @robthorn3910 8 лет назад

    Okay, from the other comments, it's clear that this tutorial gets a C. I'm a beginner and it took me several passes to find the first screen you went to. Then after I got my mask set and we switched to the "Compositing" window, things went off track. I have Blender 2.76b.
    Anyway, my previous work from the 'Motion tracking' window did not follow me. I have a 'movie clip' input and a viewer node but no sign of my clip. And we are barely started in the video. Beginner means baby-steps.

  • @OkaminoShikon
    @OkaminoShikon 8 лет назад +1

    Hmm I dont know why but my mask its not the same scale then movie. I used your move to learn and when i try ,my mask its much smaller then move i try use fixed and scale it but its not look good. Have any idea what i do wrong? :)

  • @DanielGrovePhoto
    @DanielGrovePhoto 4 года назад +1

    Anyone know where I can find free HD clips of green screen tracking scenes with an actor for practicing? Would love some of a character just walking down a camera or with some stable camera moves around the person.

    • @JeffersonDonald
      @JeffersonDonald 4 года назад

      www.hollywoodcamerawork.com/green-screen-plates.html

  • @RohitKumar-on3cu
    @RohitKumar-on3cu 9 лет назад

    At 5:7; after selecting key color if I click on image nothing is happening. My footage is 960*540 @ 23 fps & I have filled the resolution and fps properly in the beginning, what is the problem?

  • @asdasd4654er
    @asdasd4654er 7 лет назад

    Let's suppose I wouldn't put an image in the background and just leave it like this. Would I end up with something like a png, but instead of an image I'd have a video w/o background?

  • @slightlyanimated1697
    @slightlyanimated1697 9 лет назад

    Hey Cg geek, im a little new to this stuff and i was wondering how to get the image on like yours......... also what program. im guessing final cut pro or adobe ae but im not sure

    • @CGGeek
      @CGGeek  9 лет назад

      When you say get the Image on, do you mean the background replacement? after following this tutorial all you need to do is connect a background image with your green screen footage using the Alpha Over node.

    • @slightlyanimated1697
      @slightlyanimated1697 9 лет назад

      CG Geek yes thats exactly what i mean! thanks you so much! ill try to do that. thanks for responding so quick as well! also could you put the image in the desc? and how do i connect an image to the green screen footage using alpha over node? like i said, im really new to this...

  • @gameboyzuko6170
    @gameboyzuko6170 6 лет назад

    which software did you use ?

  • @digitalhouse6969
    @digitalhouse6969 6 лет назад +1

    I love the x2 speed on RUclips

  • @top5world391
    @top5world391 7 лет назад +2

    amazing

  • @pianofani
    @pianofani 9 лет назад

    Well, I'm a beginner, and I can't understand how did you get the background to move the same way that the normal video moved?

    • @vtfxfilms4876
      @vtfxfilms4876 9 лет назад

      You have to motion track it first. There are a lot of good tutorials on youtube about that ;)

  • @arughisangharteam5814
    @arughisangharteam5814 4 года назад

    Make a video about how you made this background in blender

  • @gghh-no4bn
    @gghh-no4bn 7 лет назад

    What software you use

  • @dhikaakihd
    @dhikaakihd 8 лет назад

    what camera you use?

  • @Mephistahpheles
    @Mephistahpheles 6 лет назад

    Timing is totally messed up on my clip in the "Movie Node". My 10 second clip is 40x as long (almost 7 minutes). Same clip in the video sequencer runs correctly at 10 seconds.

  • @Liam-wn7ir
    @Liam-wn7ir 10 лет назад

    Hey, can you import videos from final cut pro, into blender? If you could tell me how, that would be great, thanks!

  • @dilstories
    @dilstories 6 лет назад

    Problem is adding the background. I have a character walking through a room (which I made in Blender), and finding it hell to remove the green screen and make him walk realistically in the room.

  • @jonathanmiller9202
    @jonathanmiller9202 10 лет назад +1

    How did you get the video to show up in the background of the compositioning window? it sounded like you said Ctrl + Shift, but that did not work for me. Thanks!

    • @CGGeek
      @CGGeek  10 лет назад +1

      Yup, Control + shift clicking the node you want, also make sure you have backdrop turned on.

  • @bidhaangroups8669
    @bidhaangroups8669 5 лет назад

    which program so use please blender

  • @DuhChickenGuy
    @DuhChickenGuy 8 лет назад +17

    He never said how to actually change the scene

    • @ronniepaulinc
      @ronniepaulinc 6 лет назад +1

      he never said a lot of things because he was using keyboard shortcuts and never once told us what he was pressing......#FNANNOYING for a begginers video...

    • @PuzaExplores
      @PuzaExplores 6 лет назад

      Yeah

  • @kc3430
    @kc3430 8 лет назад

    will it work for other screens

  • @JAStudiosDankestManLiv
    @JAStudiosDankestManLiv 9 лет назад

    Video isn't playing and I can't delete the render layer for some reason, Beginner so still learning things.

  • @AshishKumar-kq6qk
    @AshishKumar-kq6qk 7 лет назад

    hey help me which software do you use

  • @Thats_Cool_Jack
    @Thats_Cool_Jack 9 лет назад

    please help, blender crashes when ever i render/composite. it works fine when using the viewer node though. it crashes even when there is no other nodes other than the ones necessary, which is just the 5 used in this tutorial. is there another way to do all the stuff you did in this tutorial using the channel key node instead of the keying node?

  • @TheMegaFunChannel
    @TheMegaFunChannel 8 лет назад

    which is the easiest vfx software to learn ???? please reply

  • @karthikeyakrishna4133
    @karthikeyakrishna4133 5 лет назад

    Dude which app!?

  • @iLikeTheUDK
    @iLikeTheUDK 7 лет назад

    Wouldn't it be better to key the fingers separately from the rest of the shot?

  • @vamsiprasanth4954
    @vamsiprasanth4954 4 года назад

    Bro can you suggest a laptop bro

  • @АртемЧелпанов-ы1щ
    @АртемЧелпанов-ы1щ 6 лет назад

    Cool!!!

  • @jayw900
    @jayw900 9 лет назад

    For your next creation series you should consider a making a beginner one.

  • @HeriMu
    @HeriMu 6 лет назад

    spek ram 2Gb Dual Core pc ,work or no