Ugly render of a CD surface

[Dario Arnaez]

Hi guys!... can anybbody help me to understand what is the error in this kind of image with artifacts? The image is fine but the CD surface zone is so ugly.

AA= QMC

rQMC: Adaptive amount 1 | Noise thres.=0.001 Min Samples=80

GI: 1st= QMC 2th=Light cache

 

QMC GI=40

Light Cache= 2000 | Filter: Nearest 5 (for what is this?)

Caustics=ON Multiplier=1 Search dist=5 Max Photons=200

 

Hope any help. Thank you in advance!

[AJLynn]

QMC+LCache GI could be problematic. Which is primary? Have you tried it with Irrmap primary and LCache or QMC secondary? If you did it that way with LCache you could reduce LCache's settings and it would be a lot faster. Also, you may need to go to adaptive AA with above normal settings, or take a look at sampling rates on the material. (How did you set up the material?)