white plaster with spots

[Lau ra]

hi, I made a render with mental ray of an interior with 3ds 2012, I applied a sky portal and a white plaster, making the render, I find myself with the plaster that is not perfectly white but has stains, as if it were dirty, what are the parameters that I can improve so that the white color is white......... .

 

[Fulvio Romano]

depth of shadows?
Why don't you put a piece of make with the problem?

 

[Lau ra]

depth of shadows?
Why don't you put a piece of make with the problem?

hi, here's the part of rendering where you see the spots, the wall looks blue instead of white............

 

[Fulvio Romano]

You can't see much. . .
Isn't that the jpeg compression that does this little game?

 

[asalalp]

post the parameters of final gather and photon map...and a larger image

 

[radiosity]

I think it's a photon problem? Did you change the radius? if not increases the number of photons of the gi.ciao

 

[Lau ra]

I think it's a photon problem? Did you change the radius? if not increases the number of photons of the gi.ciao

Hello, thank you for answering me, I have increased the samples of the sky portal and the day light and the result is acceptable ..., of course I still have much to learn like what are the photons?

 

[lattu]

photons are the light rays emitted by a light source and the final gather calculates the bounces between the various surfaces of your model depending on the type of material present (more or less reflective). the higher the value the more the calculations are accurate (but also slower)