vray & Illumination map

[ronald_a]

Hi,

I am testing lighting with fumefx (and vray) and I'm running into two issues:

- while lighting with spot and point lights, fumefx is super fast to render (using the illumination map). But using a directional light it becomes really slow (the difference for the illumation map calculation is 5.1 sec for two spotlights vs. 132.6 sec for one directional light). Is this normal behavior? Interestingly, a vray rectangular light "only" takes 57.7 seconds, which is still long, but a lot faster that the directional light.

- rendering with gi on, make the volume go black (at least in a particular test scene which I include and also contains the light setup discribed in the first point)

One point I should notice is, that we are on vray3 nightly builds, not on the original vray3 for maya build

Cheers,

Ronny

[sitnisati]

Hello,

The light rendering speed depends on the VRay light implementation - FumeFX uses the same call for all the light types.

FumeFX cannot receive GI from geometry - that would work only with Arnold (thanks to its implementation).


Regards,
Kresimir Tkalcec

[ronald_a]

ok, but doesn't it seem strange then, that the directional light takes that much longer to render? I mean I understand that an area light takes longer to render, but the directional light should be about the same speed as a spotlight.


As for GI - I am aware that in vray fumefx can't receive GI from surrounding geometry, still the volume should not render black as it receives direct lighting.

Hello,

The light rendering speed depends on the VRay light implementation - FumeFX uses the same call for all the light types.

FumeFX cannot receive GI from geometry - that would work only with Arnold (thanks to its implementation).


Regards,
Kresimir Tkalcec