Terrible color bleeding

[vgabex]

Hi!

When I change only the colors of the upper floor's backgrounk walls from white to orange, I get this.
Is it possible to see white surfaces in white color, instead the fully orange pic?

Basic setup, 1 150% spot, 1km inv2 distance, Skylight 2, 0, 0.2, 4
medium preset, hdri's saved as jpg

Any advices are welcome!

[Captain Obvious]

If white light bounces off an orange surface, the light gets tinted orange. That's just how it works.

[vgabex]

I undersand that the ligt color changes, but from this viewpoint almost evry surfaces's color is white. Ther's only one visible orange wall on the first floor.
In the real world, go into a fully orange walled room and you pull out your white paper from your pocket. For the eyes, it will be WHITE. On this picture I would like to see clearly recognitable WHITE ceilings, ground and ground level walls.

Is there any way in kray to
- discard color information for light bounce?
- use a constant color for bounces?
- controll the amount of light tinting?

[tiktane358]

what is diffuse value of tinted wall ?

[vgabex]

what is diffuse value of tinted wall ?

100%

[jure]

You should never use 100% diffuse surfaces - this effectively means all lights gets bounced.
Even for pure white wall use below 100% - 95% or similar...

[tiktane358]

yes, that what I wanted to say....

When I REALLY want a more white surface I decrease diffuse value and I increase luminosity value (50-50 for eg) and render in indirect mode .....

(I know it is not really good method isn't it Jure)

[acidarrow]

Luminosity?! If you want "whiter" surfaces, you just need more light. So either make the lights brighter, or tweak the exposure a bit.

[Captain Obvious]

Or do it in post.