[jalokin]

Anybody can tell my why i get these stribes in my image?

[Pierre Caron]

let it render longer and it should disappear

[rivoli]

are you using any grayscale map?

[jalokin]

let it render longer and it should disappear

- it's around sl 10 so i dont think that time would solve the problem

are you using any grayscale map?

I am not really sure what a greyscale map is but the material is just a flat white lambetian surface. No textures or anything else[/quote]

[glypticmax]

When I get those striations, they usually disappear between SL 12 and SL 14.
I usually get them when using a bump map or other texture. It seems flukey.

[jalokin]

glypticmax,


I will try to let it run to sl 14.

[tom]

May I have the scene for checking, thanks.

[rivoli]

I am not really sure what a greyscale map is but the material is just a flat white lambetian surface. No textures or anything else

this is what I meat by greyscale:
http://en.wikipedia.org/wiki/Grayscale
I thought that you were using either a bump or roughness map, which are often greyscale images. maxwell needs textures in rgb though, and those kind of weird effects may happen because of a greyscale map.

[jalokin]

Just had it running to sl 14 and no change

[glypticmax]

If you're not using a grayscale bitmap, you may have bumped (no pun intended) into something unusual.
I would take Tom up on his offer to look at the file.

[jalokin]

glypticmax thanks for your comments.

I did indeed take the offer from Tom.

[jalokin]

When i use physical sky instead of sky dome the striation disappears. will test again with some different sky setups.

[tom]

Hi Jalokin,

I'm not sure if it's related to physical sky or skydome but these moire patterns are due to projection from excessive amount of spherically oriented surfaces of an emitter. In other words, I just replaced your massive-poly spherical emitter with a simple sphere. It's more efficient with no more patterns. I e-mailed the scene back as well.



You should avoid using complex geometry for emitters. Especially if they are highly symmetric objects (like most primitives) and if they are already not directly seen. When you don't really need the precision in their look. Sufficient illumination needs less detailed emitters than we usually used to make models.

Best regards,
Tom

[glypticmax]

So the problem was in multi-poly emitters?

[jalokin]

Hi Tom,

Thanks a lot for your help.

when is a sphere complex?