vraysamplerinfotex without using RE?

[3dwolf]

Hi,
I would like to render out a VraySamplerInfoTex-point-world-pass without using render elements.

First try was max-standard-material with VraySamplerInfoTex as diffuse and 100 self-illumination.
Second try used the VRayLightMtl.

In both cases all three RGB-values become zero as soon as two of them are negative.

see image left 100%selfillu or lightmat ... right RenderElement ExtraTex
(it is a lattice-box 200x200x200 at 0,0,-100)

[vlado]

Are you using the 3ds Max frame buffer, or the V-Ray one? What file format are you saving the image to?

In any case, there is the possibility that V-Ray will clamp the result of any material evaluation to be always non-negative (negative material colors typically indicate an error in the shader and in a normal scene lead to all sorts of issues, especially with GI).

Best regards,
Vlado

[3dwolf]

If I am not too confused both should have been tested.
I want to save as full-float exr.
Not everything is clamped.

Here is a link to my great test-scene for the point-pass-clamping.
http://www.3dwolf.de/stuff/VraySampl...lPass_noRE.max
Also notice that it seems to work in the medit-preview on the 3rd material which is the vray-mat. But as I am not really a heavy VRay-user there might be some simple mistakes an not-knowing-errors.

I would have no problem with render elements if the max-exr-configuration would work reliable in backburnerrendering. It seems to ignore or mess up the colordepth and RE-settings on different jobs. But I guess that is a hole different issue.

Regards,
Wolf