On 11/17/19 3:56 PM, tmelram wrote:
> Hi, I am using Blender to model and wanted to use POV ray to render my scenes.
> But, I'm getting serious shadow issues. There seem to be triangles near wherever
> there are shadows!
> 
> A picture of the problem:
> https://i.imgur.com/z6Ftxv6.png
> 
> How can I remedy this??
> 

I don't use meshes often myself, but played with your scene a bit today 
using the shipped shapes.inc HF_Sphere macro to learn. I had to 
sub-divide to around 2500 points before the artifacts mostly gone and 
10000 points before really clean. Renders without AA. Your original mesh 
had 482 points.

FYI. The problem here is a general one and called variously out and 
about as the "terminator shadow artifact" / "terminator artifact" / 
"terminator issue" / "shadow artifacts" and so on. A few tools have 
claimed fixes - which involve on the fly fudging of one sort or other 
where I've peaked at them. Christoph (clipka) was working on / had in 
mind some 'fix' for POV-Ray, but not sure where it stands implementation 
wise.

The workarounds others have suggested are the ones I'm aware of for 
POV-Ray.

Bill P.

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