Hugobox

I've modified Joshua Goldberg's donut emitter so that a movie with alpha is texture mapped on multiple planes which works great. The problem is the alpha ordering I suspect: some video planes's supposedly transparent part are masking other video planes non-transparent video part, but some are actually transparent as they should. To test you'll need a video with alpha channel ex: quicktime animation... I've tried everything that had the word alpha in it, different blend modes, I'm not sure what to try next... Any pointers? Thanks. 

Hi!
I've modified Joshua Goldberg's donut emitter so that a movie with alpha is texture mapped on multiple planes which works great. The problem is the alpha ordering I suspect: some video planes's  supposedly transparent part are masking other video planes non-transparent video part, but some are actually transparent as they should. To test you'll need a video with alpha channel ex: quicktime animation... I've tried everything that had the word alpha in it, different blend modes, I'm not sure what to try next... Any pointers? Thanks. 


alpha-ordering

Sounds like a depth buffering issue. Typically for transparency, you'll want @depth_enable 0, or else the depth buffer will prevent seeing objects further from the camera drawn after objects closer to the camera with transparency.

Alpha ordering