MASH - Sticky textures with the Repro node

We get asked this all the time, so instead of me copying and pasting the same email answer, you get a shiny new tutorial :)
NOTE! I use Camera based UVs in this tutorial and I really should not have. You should use Planar UVs (Y projection) with the Camera checkbox ticked. Then you won't have to mess around adjusting your projection afterwards like I had to.