Fluid on black background

[josemendez]

Hello!

I need the liquid to display on a dark background, but it feels like the liquid can reach maximum fury only on a white background
and other background colors absorb the color of the liquid

Is it so?
What should I do if I want a bright liquid on a black background?

Hi there,

When light passes trough a transparent fluid, part of it is absorbed. So if you put any background color behind a fluid, the fluid can only darken it, it cannot possibly make it brighter. This is basically the reason why you can't see the bottom of the ocean. In Obi this is done using multiplicative color blending.

If you want a transparent fluid to "brighten" the background, then you must use additive blending. This is basic color theory. The DielectricFluid material has cloudiness controls that let you simulate suspended particles, which are added to the background color, instead of multiplied by it.

The alternative would be to use opaque fluids, of course. Depending on the exact effect you're after, you should go one way or the other.