Joined: Jan 15, 2018
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Strange rectangular shadow artifact in rendering
Hi! Firstly I wanted to thank the developers of this software! It is really great! :)
I am using it to model my small apartment and have been having a slightly annoying problem with the render. I am trying to create a "paper lantern", which is one of those typical balls made of papers that you can hang so you can have a nice light. So I defined a material, like this:
newmtl lamp Ns 1.0 Ka 0.3 0.3 0.3 Kd 0.5 0.5 0.5 Ks 0.2 0.2 0.2 Tf 1 1 1 Ni 1.100000 d 0.8 illum 9 sharpness 10
I am no expert in wavefront, but after playing with the values for a while I think that I got the effect I was looking for:
The problem is that strange artefact (the rectangular shadow) that appears when I make the rendering. If, instead of the defined texture, I apply a color (from within sweethome3d), then I get this result:
There is no artefact anymore. That means that there must be some problem with the definition of my material. But what? Can anybody help me, please?
Joined: Jan 15, 2018
Post Count: 4
Status:
Offline
Re: Strange rectangular shadow artifact in rendering
I am sure that there is nothing in-between there. I have even taken all the furniture out and the problem is still there:
From another perspective, exactly the same can be observed:
The shadow region always fits exactly some number of the square regions that take care of the rendering (the regions that get computed by each core). So that is why i looks like some problem with the rendering process.