Artifacts & Splotches despite Super high settings!

[zhiyaochen]

Hey guys,

 

I'm test rendering for an interior scene animation.

Everything comes out fine, except for the wall mouldings. I realize these are very small details that the Irradiance map may struggle with,

however I tried bumping up my IM min/max to -3/0, with Subdivs of 400! And it does not fix anything.

 

I could increase the settings even more, however the rendertime would spike since the rest of the scene already comes out fine...

 

Is this a situation where Irradiance map is just incapable of handling, and Brute Force is the only way to go?

 

Thanks

 

See pics. The mouldings and wall have a simple white material applied.

 

 

 

[Francisco Penaloza]

With those small details, you have a few options, fist, check your LC, adjust the size and quantity. Default values usually work most of the time but maybe you need to reduce the size and increase their numbers, if you are using V Ray 3.x the retrace values may help you.

Then adjust your IRR. not only the min and max values are in play here, you may need to play with Color threshold or normal threshold. If you don't feel comfortable moving all these parameter, using the medium animation or high animation preset should go a long way.

 

If you still have those dark areas, you may enable detail enhancement within IRR. That should take care of it.

You are right sometimes increasing IRR values may make your rendering as long as using Brute force. After testing a few frames you can decide.

 

What usually work by default when you have GI splotches is increase the interpolation on IRR to a close number of the subdiv and enable detail enhancement to compensate the lack of detail that a over interpolated IRR map create.

 

Hope this help you.

Edited March 28, 2016 by fco3d