V ray lighting

[boris.schneider]

Hy everybody,

 

I hope someone has time to deal with my really basic problems:

 

I start using V ray on max 5.1, and I just can't find a good lighting combination.

 

When I use Gi alone, it gives me some weared shadows everywere, looks like burnmarks on the buildings, and shadows are pixelated.

If I ad standard omni lights, it becomes to havy to render - maybe because of transparent materials..?

 

I'd like to use some photometric light, but the shadows don't seem to work.

 

What am I doing wrong?

 

thanks in adwance.

[Creapix]

Hi Boris,

 

It would really help for other people to give you advices if you could post a picture of what you're talking about.

 

From what I think it is, you may have imported the 3D objects and/or got bad geometry like double faces etc.

 

We don't know at all the transparent materials and objects you're talking about, so first step for sure is to post a sample pic.

 

Thanks and welcome on the forum

[JamesTaylor]

i use the irridance map and qmc for primary and secondary bounces, by uping the subdivisions of the lights you may reduce the pixelation that you describe with the shadows.

 

but as Creapix said, without a sample image illustrating your problems its difficult to advise

[boris.schneider]

yes, sorry for the files. here they are.

No. 1 and 2 show problems with GI.

I just rendered concrete walls ans slabs, as soon as I add windows and staircases, more complexe geometries, rendering pains with processing irradiance map.

 

3 and 4 are best results i can get with some omny lights, what keeps the image to dark and without atmosphere...

 

The geometry is imported from rhino as 3ds mesh.

Might that be the problem?

 

thanks again.

[boris.schneider]

...and here's a scrrenshot of my scene settings...

[jow]

dark burns in 1 and 2 are overlapping faces,also try a higher ir map.

3 and 4, ditch the ommi's and use one direct light with vray shadows.also looks like your hdri for your gi light isnt strong enough.try it without the hdri and a light blue in color slot....