Votes
2
Product:
iClone 7
Version:
7.91
Status:
Assigned
Issue 7921
Circular 'Artifacts' on sclera of eyes ...
Under certain lighting conditions, using IRAY, the eye 'sclera' displays circular patterns, even with the latest Digital Human eyes.

The artifact 'visibilty' depends on an interplay of;
● The *use* of, the *angle* of, and the *strength* of the KEY light.
● 'Physically Accurate Cornea being 'ON',
● The eyes being 'smoothed' with subdivision 'ON' at level 1.

please see here for full details:

https://forum.reallusion.com/Post.aspx?PageIndex=1&Task=PostTopicReply&ParentID=483241
OS: Windows 10
  •  3
  •  855
BugIray Render
Submitted bysonic7 May 15, 2021
1
COMMENTS (3)
4u2ges Oct 17, 2021 
After a bit of research I figure that the main cause of the problem is Enable Shadow Artifacts parameter. If set to ON (which is global) it strongly affects DH eyes.

NVIDIA suggest another parameter: https://raytracing-docs.nvidia.com/iray/manual/index.html#physically_plausible_scene_setup#tessellating-curved-surfaces

This parameter has to be set on object level. For instance, set it for body only without affecting eyes. 

So another Eliminate Shadow Artifacts check box on object level has to be created.
sonic7 May 20, 2021 
Here's the link to the project file ...
https://www.dropbox.com/s/jwr0hpisvbl40gp/Artifacts%20on%20Sclera.iProject?dl=0
Feedback Tracker Admin May 21, 2021 
Hi sonic7，

Ihave got it.Thanks.

Molly
Reallusion
Feedback Tracker Admin May 20, 2021 
Hi sonic7,

Thanks for your feedback.
Please help us clarify the problem by providing us with the project in question.
If the project is too large, you can upload it to the cloud (like Google drive) and then attach the sharing link to us.

Melvin
Reallusion.
1