Apparantly there's a memory leak in your app. Try 2.0b9 and see if that fixes it. If it doesn't, it could be your code or a bug (the last time it was your code). In both cases we need a small runnable code example that reproduces the problem. Small code examples help you focus on the problem, help us help you and help the developers solve bugs.

Thx amnon.owed, yes I know last was a bug in my code - and this time probably will be too :)

Wow, I think you seriously need to clean up your code. Press CTRL-T to begin with.

First, is the masking static or dynamic? The goal is to do as little things as possible during draw(). So everything that can be done ONCE, do it once and not 60 times per second.

Second, you are loading the mask shader for every SingleWord. However the shader is the same, only it's input changes. The goal is to do as little things as possible. So everything that can be done ONCE, do it once and not for each object instance. So load the shader at the sketch level and just re-use it in each object.

Third, why do you have empty draw calls for wordMask? These are costly and currently pointless.

Fourth, why you have so many seemingly superfluous aka unused variables. Two PGraphics and two PImages (are all of these really needed for a single mask? answer: no) and an unused PFont.

In other words. Autoformat. Remove everything you don't need. Optimize.

Thanks for your suggestions

I've broke apart everything to test singular features independently.