SSS material and Strip Rendering causes stripey Renders

[Dave_Wortley]

Weve just discovered whilst trying to render out a print job at high resolution using the 'split scanline' feature in backburner that if you are using Sub Surface materials, the Colour doesn't get calculated consistantly leading to a stripey renders when comp back together again by the stitching pass.

Is there any settings to improve accuracy for this?

[Dave_Wortley]

This also happens if you do two region renders, you don't get a blend between the two, you get a sharp line. Image on left is original, image on right is with a CC curve on to emphasize the issue.

Seeing as Strip rendering is effectively just region rendering I'm wondering what can be done to sample it better.

Rgds

Dave

[vlado]

You would have to render a larger region and then crop it to the desired result; how much larger depends on the scattering effect. This is because the surface illumination for the object (which is required to calculate the SSS effect) is only calculated inside the region during the prepass phase. It is possible to improve this situation and we'll be working on it.

Best regards,
Vlado