I made a simulation where two oranges fall diagonally into the water.

In the rendered animation, when the water splashes, dark sharp outlines are revealed.

rendered image

I do not want those weird formations in the simulation.

How can I remove the outlines, while still maintaining a pure white background?

Water material:

water material

World properties:

world properties

Edit: For clarification, I do not have denoise checked, and smooth shading is turned on.


1 Answer 1


As you can see in the screenshot, this happens for the drops that aren't round, but rather triangular. If you set the default cube to smooth and give it a glas material it will look similar. There is not enough geometry to support proper transmission behaviour. 3 solutions.

Set it to auto-smooth. This is a hack, while it will save you RAM it's bound to flicker in an animation and might cause strange artefacts, worth a shot though.

Use a subsurf modifier after the water, quick fix, will increase render times.

Increase the simulation detail. The latter will increase your simulation time and render time, but also will yield more precise results.


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