Round edge

[Yannick]

Hi,

I have a scene that normally take about 1 hour per frame. However, I have added a round edge on one shader (that is assigned to a few objects) and my render time has exploded (up to 6-7 hours).
Is there anything I should look for? Any threshold somewhere to help me bring this back to normal?

I am using
[2013/Jul/18|13:47:54] V-Ray: V-Ray for Maya version 2.10.01, revision 22430 from Oct 11 2012, 03:44:09

Thanks,

Yannick

[doark]

Perhaps...

Hi Yannick,

Perhaps the number of Max Subdivs in (Settings -> Default Dislplacement and Subdivision) is influencing the render time. I do not know for sure but may be it!

[Svetlozar Draganov]

Round edges option doesn't subdivide the geometry, so the Default Displacement and Subdivision settings shouldn't influence render-times for round-edges in any way.
Probably the issue lies somewhere else - would it be possible to attach original scene or stripped down version of it which still holds this issue ?

Thank you very much in advance.

[Yannick]

Hi Svetlozar,

Unfortunately, I cannot send you my file as it is confidential.
After trying a few thing, I might have found a workaround. My scene had cached GI. So I try to re-cache the GI and the render time came back to its original time.
Would the round edge get involve in GI?

Cheers,

Yannick

[Svetlozar Draganov]

Thank you for your feedback.

Yes GI is involved with round-edges calculation so if you have pre-calculated GI and decide at later stage to turn on round edges the end result won't be correct.
GI solution must be calculated again in order to produce correct result.

[Yannick]

Thank you for your feedback.

Yes GI is involved with round-edges calculation so if you have pre-calculated GI and decide at later stage to turn on round edges the end result won't be correct.
GI solution must be calculated again in order to produce correct result.

it didn't look wrong, but the render time were crazy.

[Svetlozar Draganov]

It is probably scene dependent - in my tests I got wrong result when I used pre-calculated solution with no round edges on the scene with round-edges, but the render times weren't crazy it were a bit slower but almost unnoticeable.