Render translucent objects with strange black line,when Using GPU render.

[elisa_christie]

This is a comparison of CPU and GPU
I'm using vray 22679,houdini 20.0.590,windows

[viktor_angelov]

Hello elisa_christie We are currently investigating the situation. Will contact you once we have more information regarding this case. Thank you!

[viktor_angelov]

Hello elisa_christie It seems like this only occur on this specific scene as we are unable to reproduce it elsewhere. If yes, you could simply redo it. Could you confirm if that's the case here?

[elisa_christie]

In my experience, these conditions are required to trigger the bug
1：The size of the transparent object is very small
2：The surface of the transparent object is uneven(not a flatten plane)

here is another test scene Test_scene_V2.zip

[viktor_angelov]

Thank you for the details, elisa_christie I will take a look at the new scene and come back to you.

[viktor_angelov]

elisa_christie I managed to reproduce it and will be logging it into our system. However, could you please let me know why would you want your geometry to be so small ( scale of 0.002 / 0.003 ) ?

[viktor_angelov]

The issue is logged into our system [HOU-4221] Thank you for taking your time to share it with us.

[elisa_christie]

This problem occurs when small eyelashes meet the head,I think this is a very common situation

[viktor_angelov]

Thank you for letting us know elisa_christie