Refraction splotches

[sine_mare]

Hi all,

after browsing through forum and trying several solutions, i gave up...

I think you will find enclosed pic quite self explanatory - i can't get rid of this splothes on my refractive/reflective material.

Glossy reflections and refraction are turned off.

Anyone has any idea what could be the problem?

Thanks,

Sinisa

[Neilg]

I've had this before, you using a hdri with a very strong small light source? Try blurring it a bit, making a bit more of a gap between the glass and object underneath and turn up the IR map settings. I dont know which one fixed it, I did all of those at once.

I assume all your materials are vray too, no weird maps in reflect/refract?

[sine_mare]

Actually i'm using vray sun/sky combination.

Yes all materials are vray. No strange maps, standard or arch materials...

actually scene is quite simple with only one mapped material.

[samuel_bubat]

It might be the "sunlight visible" option. Turn it off and see if this helps.

[instinct]

Is this with GI ? If so try turning off "Refractive Caustics" in the GI settings.

Regards,
Thorsten

[sine_mare]

@instinct - i did that but didn't help.

however i got rid of that after doing 2 things - i've removed hdr map that was (by mistake) mapped on one of my planes and unchecked sun visibility as samuel suggested.

When i finish rendering the scene i will go back one step and see what was causing the splotches... so i can post here again.

Thanks again for advices

Sinisa

[andrewjohn81]

Are you by any chance using the Light Cache? If so, make sure the "use for glossy reflections/refractions" is turned off. I've noticed some terrible results, sometimes subtle, when looking through a glossy material using that. Otherwise the renderings are much faster. eh. you win some, you lose some.

[worldmode]

if you have in the material change the color of the refract brighter than black or use an opacity map, you must turn affect shadows on. do you have it on?