Blocking Fill Vray Enviornment Light

[kwerch]

Hey All-

 

I am trying to "block" some of the enviornment light at certain places in a scene-

 

I am lighting this scene with an environment light only and what seems to happen is that the more light that I have that passes into the room, the more certain parts of the Window trim become overexposed .

You'll see it on the side casings.

 

I also get alot of color bleeding onto the kitchen ceiling from the window trim as well-

 

Any suggestions/

 

thx.

karl

[Tim Saunders]

It tends to be a debated topic lately, but I suggest adjusting you color mapping. Maybe trying out hsv exponential. Color bleeding changes a bit from those settings, but you can also decrease the gi generated by the object in the the object's vray properties.

[mahorela]

there is a saturation level in your GI settings dialogue, reduce this and the bleed will be less....well....saturated.

[Christopher Nichols]

I would say that the problem is "bigger" than that. The main issues may be the fact that you are not using gamma correction. What tends to happen in that case is that the scene looks dark and so you fight this by increasing the amount of light. This causes the GI to and Color bleeding to get really hot. What I would do is either use a linear work flow or for a quick and dirty try, use the gamma correction color mapping with 1/0.4545. Once you have done that your image will look really blown own. Start dailing down the intensity of your lights until it looks better. Keep in mind that if you don't use the gamma correct your image, lower intensity colors (such as the shadows and the GI) will be more saturated. You may be interpreting this as too much color bleed. This is incorrect.

[kwerch]

It tends to be a debated topic lately, but I suggest adjusting you color mapping. Maybe trying out hsv exponential...

 

I'll play around with this more-Less Color bleed indeed-

[kwerch]

there is a saturation level in your GI settings dialogue, reduce this and the bleed will be less....well....saturated.

 

thx for pointing this out-

[kwerch]

What I would do is either use a linear work flow or for a quick and dirty try, use the gamma correction color mapping with 1/0.4545.

 

What are the numbers referring to? THe Dark and Bright Multiplier?

[Tim Saunders]

yes

[Christopher Nichols]

What are the numbers referring to? THe Dark and Bright Multiplier?

 

And you DO do the color mapping as I outlined do it before you try anything else like GI saturation which is in fact a bad way to go and should only be used as a last resort.

[kwerch]

Thanks for responses-

I only had the enviornment light going in the first image that I posted-

 

When I added a sphere light as a sun at 7 and two vray area lights under the ceiling at .75 it changed things drastically-

 

Big help to set the gamma correction at 1 and .4545-

 

On to some texturing...

 

k

[Christopher Nichols]

Sounds good... sounds like you are are doing the right thing. Yeap, texturing would be the next step. May want to to darken and desat some of your texture a bit which may help also. You probably also saw a reduction in rendertime, no?

[kwerch]

The render time was at about 1 hour down from 1 plus-

 

Big thing was that I did some tests doing the light cache/light cache - ( I just finished up the interior lighting dvd last night) saved me LOADS of time-