Colours dissappear in Render mode

Rhino
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1

Hello. Can anybody help me. I made a coloured pyramid in Rhino (I made coloured triangles using Hatch and Explode steps), but when I’m rendering colours behave weird appearing and dissapearing when I change the position of the pyramid in the viewport. What can be a problem and how can I fix that?

weird-render
weird-render1920×1920 107 KB

render-preview-06.3dm (590.3 KB)

2

Most of your colored faces are offset from the underlying white surface by a small amount, but some aren’t and those are causing your problem since the renderer doesn’t know which surface should be drawn on top.

3

Thanks. I dragged them out and this solved the issue.