I could use some help dialing in render settings.

Assume im working on somthing like a scratched up and dented silver car.

I'm getting ok results with mp-pbr
7x7 pixel samples
4-16 ray shading samples
ray variance noise 0.02
8 shading quality (dicing)
motion factor of 0.75
env light at quality 1
high angle spec/reflection quality at 1

Anything jump out at you as being way off base? I don't really know what im doing here so I may have arrived at a poor solution.

Also the formula for motion factor in the docs is mildly confusing, nowhere does it have an input for what number you type in the motion factor box to get a sense of how much 0.75 lowers the dicing… I tried 5 and it was a brutal shading drop….

Any insight is appriciated.

Michael Blackbourn
The Embassy VFX

Your dicing is crazy high!

Min ray shading could probably be 1.

Ok, so lower the dicing and use what to compensate… min rate? But you recommend setting that to 1…. I'm getting pretty splotchy blobs with low dicing from my environment light.

Any tips on motion factor settings?

hi

not sure i'd be using MP-PBR?

defiantly try lowering your ray samples and up your pixel samples a bit.
shading quality of 8 is huge, i generally get away with it set to 1.

check out this thread posted here a few days ago, Jason Iversen posted some usefull settings here
http://www.sidefx.com/index.php?option=com_forum&Itemid=172&page=viewtopic&t=21548 [sidefx.com]

jason

Thanks. This was Jasons data:

Pixel Samples: 7x7 (up to 10x10 if the scene really needed it)
- Min/Max Ray Samples: 1/9 – sometimes 2/9
- Noise Level: 0.08 (this seemed good enough to us … less than film grain)
- Reflect/Diffuse Limits: 2, 2
- Color Space: Gamma 2.2
- Color Limit: 4 (your 1 is clamping way too hard)
- Photons: 2m photons for a huge room. Yours is 7m! I'm sure 1m is fine for this space. Ratio was 2.5.

Photons don't apply here as things will be moving too quick and you'll get the smudgy flickers

He's using rt-pbr (i think) and so 7x7= 49 x 2min and 49 x 9max is his shading samples per pixel: 98 to 441

I used on my last round:
6min 12max with a shading dicing of 6…. so my numbers for shading per pixel are: 216 to 432

so not entirely out of the same realm.