OTOY Forums

I have seen on this board that you need Alphashadows disabled to get a good SSS effect for skin. (I've tested it for myself and it is true, alphashadows enable kills the SSS effect)

But disabling Alphashadows created a big problem for transmapped hair, eyeleshed, etc.

How do you get around this issue?

Alphashadows disabled ]

I have never disabled these whilst rendering, but I will have a play and see what I can comeup with, never really had a problem as all my renders seem to have this enabled. Maybe you could post some of your findings be interested to see what your pictures look like

There was an SSS fix put through in Octane 1.13 too - so this might be different on that version. If not - then it is a general Octane issue and should be reported to Otoy.

Paul

Example Issue. This is done (with the poser plugin) in v1.13

JeffGalloway wrote:Example Issue. This is done (with the poser plugin) in v1.13

Have you tried setting Absorption and Scattering to 0 and Phase=Scattering Direction to 1?

KleanZlate wrote:Have you tried setting Absorption and Scattering to 0 and Phase=Scattering Direction to 1?

Yes, I have tried that - and it does not give the same effect that I am getting with alphashadows disabled. There is something about the alphashadows enabled that deadens the SSS effect especially in the large volumes of the body.

Thanks for the comparison image - very useful. I have escalated this issue to Otoy.

Paul

Otoy have looked at this, and been able to reproduce the problem in Octane Standalone, so it will be fixed in a future release.

Paul

That's good news!

Can you tell from this:

viewtopic.php?f=33&t=32582

...if the fix for the above issue made it into this (1.15) release?