Standalone bug? VRayLight with Direct Illumination

[Echadwick]

When I use a VRayLightMtl with Direct Illumination enabled, I get different results in V-Ray 3ds Max vs. in V-Ray Standalone. Standalone is much darker.

This can be solved by plugging the VRayLIghtMtl into a parent material, which can be a VRayBlendMtl or a Multi/Sub-Object Material (probably others?). But this seems like a bug to me.

Has this been fixed in a later version?


3ds Max 2020.3
V-Ray Next 4.30.00
V-Ray Standalone Windows 4.30.00

backplate_Standalone_test.zip

[milva.perkovich]

Hi,
Thank you for the feedback! We will look into it.
Best regards,
Milva

[milva.perkovich]

Hi,
This behavior is due to the fact that geometry with VRayLightMtl applied to it and Direct illumination enabled exports as a mesh light which doesn't support Compensate Camera exposure.
A new feature request is logged in our internal bug-tracking system (VMAX-10383), but for now make sure that these two options are not enabled simultaneously to avoid differences between max and Standalone.
Best regards,
Milva