honestly, i have seen ALOT of tutorials, including the inhouse ones here at ILM and none of them explain all this as well as you have in this series! KUDOS!
I just watched all of your tutorials, and I would love to see more ! Your tuts are very detailed but still perfectly understandable (and you speak clearly enough so that even foreign people can understand, and that's a big plus). I learned a lot more by watching them than I have while watching people juste explaining what they did. You actually explain the mechanism behind the actions and that's really, really great ! Hope the next part will come soon, thanks again !
Regarding the formula for Over mode A + B(1-a), your breakdown shows that A is multiplied first by the alpha (a), which is correct - so the formula should actually read A(a) + B(1-a). Long story, Nuke's tooltip formula(s) expect premultiplied input in A.
even i too have this doubt. But then only i come to know that, he is right. Because in Input A,alpha should be baked before. but he done seperately. thats y we got confused.
great tutorials man.. use the ibk stack method a lot at work as well. if you could cover in your next edition, some techniques on how to add fine hair detail back / shadow details or doing a merge overlay/plus of highlights or hair would be nice too :)
Is it normal that when you have to grade down transparent, despilled edges from a value of say .6 luma to .1 luma (or less) that the edges tend to break up because of compression? What I'm seeing after grading it down are what look like compression blocks, jagged edges which even start to erode and eat into the core of the subject I'm trying to key. The footage I'm having trouble with is shot in 4K XAVC 10bit 422 loaded in Resolve 12 and exported to uncompressed dpx. I'm compositing in Blender. When grading down those edge blends I use a gamma adjust on the alpha channel before it merges with the despilled background, just as you taught us. A workaround is to blur the edge matte.. this breaks up the compression blocks and works really well with subjects that are out of focus.. but I haven't found a good solution for subjects that are in focus without messing up the edges. Then again.. maybe in this particular shot I don't need all that hair detail since the hair itself is black (there isn't any back light highlighting the edges of the hair) and the background is very dark as well.. So even if I found a way to keep all that fine detail.. it would probably not even be visible. But I was wondering anyway.. is this because of compressed footage or is it something that you have to take into consideration when lighting the green screen; if you know that the background you're going to stick on the screen is going to be very, very dark, almost black or black then maybe you would have to underexpose the green screen a little bit so that when you grade it down afterwards, you're not degrading the footage that much?
One of the most in depth explaination I ever seen.
honestly, i have seen ALOT of tutorials, including the inhouse ones here at ILM and none of them explain all this as well as you have in this series! KUDOS!
i guess it is quite randomly asking but does anyone know a good place to watch newly released tv shows online?
@Jaden Roy Ehh I'd suggest Flixportal. just google after it=) -julio
@Julio Quinn Thanks, I signed up and it seems like they got a lot of movies there :D Appreciate it !
@Jaden Roy glad I could help =)
Please, continue. These tutorials are amazing. Among best I've seen. :) Thanks
really amazing job done.
would love to know more, please we are waiting for the next video.
i am very grateful for this tutorials. helps a lot.
I just watched all of your tutorials, and I would love to see more ! Your tuts are very detailed but still perfectly understandable (and you speak clearly enough so that even foreign people can understand, and that's a big plus). I learned a lot more by watching them than I have while watching people juste explaining what they did. You actually explain the mechanism behind the actions and that's really, really great !
Hope the next part will come soon, thanks again !
Thanks for making these tutorials, very informative and easy to understand.
Can't wait for the next one
Keep doing this lessons please
you are truly amazing......God Bless You...
Regarding the formula for Over mode A + B(1-a), your breakdown shows that A is multiplied first by the alpha (a), which is correct - so the formula should actually read A(a) + B(1-a). Long story, Nuke's tooltip formula(s) expect premultiplied input in A.
even i too have this doubt.
But then only i come to know that, he is right.
Because in Input A,alpha should be baked before. but he done seperately. thats y we got confused.
thank you for the tutorial... it has been helpful for me :3
Great tutorial yeat again! Thanks
Thank you so much!
30:00
"It will give you an extra edge"
hahaha :D
great tutorials man.. use the ibk stack method a lot at work as well. if you could cover in your next edition, some techniques on how to add fine hair detail back / shadow details or doing a merge overlay/plus of highlights or hair would be nice too :)
nasty motion blur keying techniques and battling with rough edge blending between FG n BG would be cool too if you need some opinions.
Great Tuts, When will be the next video released
Is it normal that when you have to grade down transparent, despilled edges from a value of say .6 luma to .1 luma (or less) that the edges tend to break up because of compression? What I'm seeing after grading it down are what look like compression blocks, jagged edges which even start to erode and eat into the core of the subject I'm trying to key. The footage I'm having trouble with is shot in 4K XAVC 10bit 422 loaded in Resolve 12 and exported to uncompressed dpx. I'm compositing in Blender.
When grading down those edge blends I use a gamma adjust on the alpha channel before it merges with the despilled background, just as you taught us.
A workaround is to blur the edge matte.. this breaks up the compression blocks and works really well with subjects that are out of focus.. but I haven't found a good solution for subjects that are in focus without messing up the edges.
Then again.. maybe in this particular shot I don't need all that hair detail since the hair itself is black (there isn't any back light highlighting the edges of the hair) and the background is very dark as well.. So even if I found a way to keep all that fine detail.. it would probably not even be visible.
But I was wondering anyway.. is this because of compressed footage or is it something that you have to take into consideration when lighting the green screen; if you know that the background you're going to stick on the screen is going to be very, very dark, almost black or black then maybe you would have to underexpose the green screen a little bit so that when you grade it down afterwards, you're not degrading the footage that much?