Hang setting alsurface sss density to 0

[1funk]

Hang setting alsurface sss density to 0

Tested in 3.5 and nightly 28092

1. Load the attached file into the Render Vray layout
2. Press the Start RT CPU button in the top modo toolbar
3. Set alsurface sss density scale to 0
4. Press the Stop RT CPU button in the top modo toolbar (dont press stop in VFB)

RESULT: Modo hangs

NOTE: Even if you dont press the rt stop button, it leaves modo in an unstable state and hangs trying to close modo down.

[boyan]

Hey, funk.

Thank you for the feedback. I am able to reproduce the issue and I'm going to log into our system.

Cheers,

[1funk]

Just following up on this thread. Any news?

I tested in nightly 28908 and it still hangs modo

[Muhammed_Hamed]

Tried the same settings in Next for Maya, it doesn't crash
viewport IPR and frame buffer IPR, it doesn't crash Vray

[vladimir.nedev]

I think the bug is still there in Next, you just need a Dome light to trigger it and also set the density scale to zero.
Then you can reproduce it in Maya too.

Zero for the density is unexpected and should be clamped internally.
I will write back here when there is a fix in the nightly builds.

Greetings,
Vladimir Nedev

[1funk]

Thanks for checking vladimir.nedev
The reason this came up is because I was using modo's slider to change the value, and its easy to accidentally slide to 0. I thought it may have been a relatively quick fix to clamp the lowest value internally.

[vladimir.nedev]

Yes, I understand how it can happen and it is an easy fix.

Greetings,
Vladimir Nedev

[Muhammed_Hamed]

Thanks Vlado!

[vladimir.nedev]

This should be fixed in the nightly build from 2019.02.16 . Note that I forgot to update the change-log, so it's not mentioned there.

Greetings,
Vladimir Nedev

[1funk]

Thanks vladimir.nedev

[Muhammed_Hamed]

Thanks Vlado!