Demi

i wonder why i can't use a matrix as mask. Look the patch below. Based on the tutorial 29 i modified the idea and realised that using a matrix as mask is not possible! is it?

I appreciate any suggestion that helps me understand

mask-from-a-matrix

i send you 3 version they should explain my idea. The 3th is the one i'm interested in. is it possible to show the resulting video without any flickering?

try this: 
(in response to your second patch)

my previous patch should answer the question regarding the flickering. look at my use of the trigger object, and exactly when the alpha mask is getting banged. order is important here (as in everything in max).

my previous patch should answer the question regarding the flickering.  look at my use of the trigger object, and exactly when the alpha mask is getting banged.  order is important here (as in everything in max).


Thanks to both of you. These are the solutions i was looking for. Especially the order of triggering bangs was important.

In my examples there was the first bang given to the jit.noise object. Did this cause the flickering (see 3th version of my last patch)? Meaning that two datastreams did "fight" for the place in jit.pwindow?

Thanks to both of you. These are the solutions i was looking for. Especially the order of triggering bangs was important. 

Mask from a matrix