shadows not correct on opensubdiv surface

[smbell]

the shadows on my surface don't seems to match up to where they should be when opensubdiv is turned on.

first image is off, second is on.




It actually seems to do the same thing but not quite as bad with rounded corners on and opensubdiv off.

[Morbid Angel]

did you lower the shadow bias value in the light?

[smbell]

did you lower the shadow bias value in the light?

I did not know that was a thing... lowering it fixed it. Thank you very much. I still have much to learn.

I'm used to ray-traced mental ray shadows etc. Didn't even think about that.

[Morbid Angel]

sure! think of it as an optimization feature. On large, very large scenes where some objects can be very small, it can speed up rendering. Or if you don't care for that just set it to 0.001 and it will be always tracing every bit.

[RichardBlank]

Always wondered why 0.020 is default...

[vlado]

There is no specific reason. Ideally it should be auto-determined in some way, but we haven't done it yet.

Best regards,
Vlado

[Morbid Angel]

Vlado this value is in system units correct?

[vlado]

Vlado this value is in system units correct?

Yes.

Best regards,
Vlado