Mesh and Fluid Problem

[sc00b]

Exactly. But pure green + red = yellow, not brown. To get brown you’d need dark green and dark red.

You can change the blending mode in FluidColorsBlendSimple.shader. Here's a list of all blending modes supported by Unity:
https://docs.unity3d.com/Manual/SL-Blend.html

So instead of multiplicative:

Code:

Blend DstColor Zero

use additive blending:

Code:

Blend One One

Blend One One - this mode creates a red center and white in a circle, but in the end everything is white)