white dots in wood surface

[Guest nazcaLine]

hi everybody. in the image shown, i get these strange dots on the wood surface. it's a material with a wood bitmap, glossy refl 0.8, 16 samples. parameters: irr map very low (because it's a big render, 2400 px) 100-80 hemisphere-subdv, light cache 1100, sample size 0.02, use light cahce for glossy rays uncheked.

 

i tried raising the subdv in the mat to 24, but it only increased the time dramatically (4 times more) and the dots still there. i decreased the sample size in the light cache (0.015) and nothing.

any clues, please?

 

Eduardo

[Tommy L]

Probably the sub-pixel mapping and clamp output in the color mapping tab (check both). If not, try upping the sub-divs/samples in the vray lights maybe?

Tom.

[Guest nazcaLine]

it was the goddamn subpixel mapping. thanks tim!!!

i never have it active becaus to tell the truth i don't have any idea what it is for. any explanations?

[BrianKitts]

from the manual....

 

Sub-pixel mapping - this option controls whether color mapping will be applied to the final image pixels, or to the individual sub-pixel samples. In older versions of V-Ray, this option was always assumed to be on, however its default value is now off as this produces more correct renderings.