Pattern in image

[Mats_O]

I get some strange pattern in a hires image. Attached is a part of the image. The pattern has the same size as the rendering buckets.

Some of my overall high settings:
AntiAlias: Mitcheli-Netravalli
Irradiance Map: Medium
Light Cache: Subdivs 2000, sample size 0,009
3 lights all have subdiv 30
VRay physical Camera

Problem occurs both with and without DOF.

Any hints?

[vlado]

Do you have the sub-pixel mapping option in the Color Mapping rollout enabled or disabled? Also, what are your AA settings?

Best regards,
Vlado

[Mats_O]

Do you have the sub-pixel mapping option in the Color Mapping rollout enabled or disabled? Also, what are your AA settings?

Best regards,
Vlado

Vlado,

I am using HSV exponential with sub-pixel mapping enabled. For AA, I am using Adaptive DMC, Mitchell-Netravali, size 4, ringing 0,333, Blur 0,33 and for for adaptive DMC min subd. 2 and Max subdivs 4. DMC sampler: 0,85/0,005 and min samples 8.

Thanks / Mats

[jozef_chvojka]

... distributed rendering?

[Mats_O]

no, rendering on a single machine.

[Mats_O]

Vlado, did you have a solution or is this a bug?
Thanks in advance!

[vlado]

Is it there if you turn off "sub-pixel mapping"?

Best regards,
Vlado

[Mats_O]

Is it there if you turn off "sub-pixel mapping"?

Best regards,
Vlado

I tried both with and without sub-pixel mapping with the exact same result. Any other thoughts about what is causing the problem?

[vlado]

Nope; at this point I will have to look at the scene in order to be able to tell you more. If you can send it (or at least a part of the scene) to vray@chaosgroup.com it will be very helpful.

Best regards,
Vlado

[frutods]

I was having the same issue, but it dissapeared when I turned off the "sub-pixel mapping" option.

[Sushidelic]

Just a shot in the dark, but as it appears mostly around geometry edges, could it be you have detail enhancement enabled and that is causing the problems for whatever reasons?

EDIT: just saw that this was a very old thread... so might be a little late