I'm using particle with double multiply blend function, this is how it looks: http://puu.sh/hVGpW/e9106d8a65.png

Usually they look fine ingame http://puu.sh/hVG5p/ff61e62584.jpg but sometimes, usually in darker places, they have dark squares around them http://puu.sh/hVG93/a4337ee046.jpg Does anyone know if there is a way to fix that? I'm not going to use alpha blend because it tends to cause clipping problems.

It's a particle that I'm using as a decal because as we all know we can't have decals on scenery and vehicles. I'll try what you suggested but I don't see how that is going to work.

EDIT: I kinda solved the problem by just using white background and multiply blending. It looks good enough I guess.
Edited by altis94 on May 21, 2015 at 05:30 PM

As far as I remember, double multiply uses a half light gray as background, thus it darkens using darker parts and can maybe lighten using lighter parts.

Multiply uses a white background and can only... Blend pixels that have a darker tone than the base pixels. On the first pic it looks like you used multiply only. Add just acts like add in photoshop.

I have a feeling that in your second picture the PARTICLES may be affected by the lighting, try with self lit to check if I am right but it will look bad in most cases.

Subtract may be a good alternative to get black holes only to appear. I think you'd have to invert the colors
Edited by bourrin33 on May 21, 2015 at 06:17 PM