Help Fluid rendering on small scale

[josemendez]

Still the fluid is almost transparent.

That's probably due to absorption:

http://obi.virtualmethodstudio.com/manua...ering.html

Absorption simulates how light decays as it travels trough fluid. If your fluid is very thin, it will look almost transparent since light travels a very small distance inside the fluid. This is intentional, it is the reason why many fluids (for instance orange juice) look almost transparent when only a thin layer is dropped on a surface, but when you have a glass full of it it looks almost opaque.

Cranking up the absorption parameter in the renderer will bring color back to the fluid.