This is probably a silly question. I’ve tried to read up on shaders but I think I’m still a class-A bafoon :-\
I have a sprite in my game of a pretty large castle wall. Right now for my fire and poison effects I have complete copies of the sprites with gradients applied. It seems like a pretty large waste of space for just a gradient.
I’ve found some shaders that I can apply to my sprite to make a gradient, but I can’t seem to skip transparent pixels. When I apply it I just get a big gradient rectangle. If I want to apply a gradient or effect to my texture, is there a way to ignore transparent pixels?
The one tutorial I found that seems to achieve this only works on GL10 
Cheers!