vray light:dome -how does it work?

[flipside]

Tammo,

I think that the solution is to render with
vray materials!

Stamcat.

could be, I also used vray materials

[tammo]

stamcat you are right, its got something to do with materials.

some of the teapots on this picture have vray mats, some standard and some of them dont have a material applied.

they all get light from different directions.



this is the strangest picture i ever rendered with vray.

[TishoChaos]

The new type of vray light - dome - is analogical to the standard max skylight. And as such its position and scale does NOT matter to the lighting solution. What matters, however is the rotation of the light. If you want to light the scene straight from the top, your local Z axis should be upwards.

Here is a small example:

adaptive subdiv 0/3
gi primary - irrad low preset
gi secondary - monte carlo 1 subdiv
320x240res

Z-axis straight up:


Z-axis rotated on 45deg:

[cpnichols]

BTW... if ever anyone want to know if Vray can do Ambient Occlusion, just show them that. A dome light render with no GI.

[v_wrangler]

Very nice. But I wish it was mappable..

[v_wrangler]

Hello Tisho,

I find the current VRAY Mtl Hilight glossiness reacting very bad to presence of
a dome light. As in- it takes so long to render and the noise won't go
away, whether you crank up the light's shadow samplings nor the material subdivisions.
I do not know if its a bug or a feature limitation.

I understand that skylighting isnt to suppose to affect specularity
and you'd need an actual (visible) light for glosiness to work.
But, with previously built scenes/mats with strong hilight glossiness..
(above 0.5 values) this becomes a nagging problem.

I can shellac this though but I was wondering how you guys would
work around it.

I do not remember having this problem the first time dome light came
out (1.46.04?)

[vlado]

Hello Roy,

This has been noted, and it will probably change (I mean the dome light will not generate hilights).

Best regards,
Vlado

[v_wrangler]

Thanks Vlado, looking forward to the update

[cybling]

Cant find the dome light in my 1.46.1....is it a 1.09 thing?

[paulison]

cool, looks good considering no GI but it has a lot of grain my my tests

[Da_elf]

tisho did use GI in his examples though

[TishoChaos]

yea, as Da Elf said: there is GI in this scene.
Paulison, you can try to raise the light subdivs in order to avoid granularity.

[shytigercp]

re

This whole scene is lit with nothing but the dome light.

[RErender]

what was the rendertime on that shytiger?

[shytigercp]

re

Somewhere between 15 and 20 minutes 3200x2400.