Hard shadow lines at the tangent of objects. Bug in Superfly?
amethystpendant last edited by
Also, does the same appear using CPU rather than GPU rendering?
The fingers was with subdisvsion=1
this new pic is the same with subdivision=2
With subdiv= 2 it's better but not away. It seems as if in some parts the geometric is noch smoothed.
It's the same with CPU or GPU
joker last edited by joker
Here an other example
It's scattered light trhough glass. The geometric is not smoothed on James. Only the scattered light through the glass windows in not smoothed. the other light sources are correct smoothed.
It's lowpoly james. Maybe here it's an other reason
ghostship last edited by
@joker yeah, super low poly model is not going to give the best results. 1) use higher res models, 2) make sure you have sub-division on.
What kind of light is that that is throwing the sharp shadows?
Here is an example with michael 6
I realy dont understand why I get this shadow edges
.. I am not sure, but I think this issue is since the last update...
Nope - It's a known problem with Cycles since forever.
Nobody on the Cycles dev team seems to care. It is not likely to get fixed as it's part of the fundamental way in which a pure ray tracer works (or fails to work in this case).
I think it is caused by self shadowing. The shadows are calculated before smoothing is applied (actual geometry) and the shading is applied after smoothing. Depending on the angle of the light throwing the shadow, you can have these kind of artifacts.
Sometimes changing the angle of the light somewhat can help or you can try adding subdivision to that section.
This is a problem which happens in other raytracing render engines as well (such as Octane).
You can read a scholarly paper, written 21 years ago, that explains this and other rendering problems in more detail. However, knowing why it happens does you little good.
Subdivide seems to be the best answer, although clearly it demands enormous amounts of memory.
It's also found in Iray (Daz Studio)
Thank you very much for your answers. Now I know it's not an issue on my Poser only.
So I don't have to search the reason any longer :-)
I usually change the light position or direction a little bit, then it often goes away