Masking with Gem

Reply to Masking with Gem on Sun, 19 Apr 2026 12:54:09 GMT

Yar — Sun, 19 Apr 2026 12:54:09 GMT

I'm trying to use a video and mask it with a noise image. The video and noise are working fine independently but when using [pix_mask] it isn't working (the original video looks the same). What might be the problem? Both files have a [pix_resize x y] of the same dimensions. I attached the file in case it helps.
videorec.pd

Reply to Masking with Gem on Sun, 19 Apr 2026 13:37:40 GMT

whale-av — Sun, 19 Apr 2026 13:37:40 GMT

@Yar You have a couple of [gemhead]'s
You could try fixing the rendering order...... see the [gemhead] help file..... as the mask needs to be rendered after the original for every frame (I think.... it depends on the effect you are looking for).
David.

Reply to Masking with Gem on Sun, 19 Apr 2026 13:57:35 GMT

Yar — Sun, 19 Apr 2026 13:57:35 GMT

@whale-av I tried now both with 52 and 49 but it didn't work...
I'm trying to make the original video show only in pixels that are white in the noise

Reply to Masking with Gem on Sun, 19 Apr 2026 19:39:34 GMT

willblackhurst — Sun, 19 Apr 2026 19:39:34 GMT

I looked at the file but didnt look at a video. I think you dont want to put "texture" before mask. it goes after mask. you would check the two image channels separately and texture them to a rectangle one at a time maybe and then change it to mix with mask object and then texture to the rectangle.