Color Bleeding

[artchung]

sorry guys, i know this has been came up couple times in the forum. I read almost all of them, but still couldnt figure out the best way to get rid of the bleeding. 2 methods i tried

1) set the saturation low like 0.5. the result looks good, but not totally satisified

2) tried to render w/override material checked (white color). saved that IR map, then re-rendered. the rendering came out very bright. Did I do that wrong? what color should I set when I render w/override materials checked.

I am sorry for my stupid Q. But if someone can show me step by step to render it properly, that will be great!!! highly appreciate it!!! thankyou!!!

[dalomar_cg]

Re: Color Bleeding

You're close with number 2...don't override all the materials, just the one thats causing the color bleeding

http://asgvis.com/index.php?option=c...27469#msg27469

[artchung]

Re: Color Bleeding

thanks dalmor...but i still dont get the result i want. here is what i do. see if i do something wrong.

1) i rendered w/over material checked & without final render(i use gray color 230, 230 230 ). by the way, what do u mean neutral color?
2) i saved the IR map.
3) then i use the saved IR map to re-render the scene with final render

but the result came out white which my wall should be creamy color. Also it shows up darker too. do you know why?

[dalomar_cg]

Re: Color Bleeding

your issue is with number 1...don't override all of the materials, just change the one that is causing the majority of the color bleeding. As for a neutral material, that could be a less saturated version of the material (probably best), or just a mid to light gray material.

So if I had a white room with a red carpet on the floor, the room might be coming out too pink for my liking. If I override all the materials as white, the resulting solution is going to be too flat, and possibly brighter than I'd like. If I just changed the rug to a white/light gray material, then the room would loose some realism (there would be no red tint to the color bleeding...we want to decrease it, not remove it). If we use a desaturated red, so something pink-ish, for the rug material, then we'd be probably in a better situation.

[nomeradona_cg]

Re: Color Bleeding

your issue is with number 1...don't override all of the materials, just change the one that is causing the majority of the color bleeding. As for a neutral material, that could be a less saturated version of the material (probably best), or just a mid to light gray material.

So if I had a white room with a red carpet on the floor, the room might be coming out too pink for my liking. If I override all the materials as white, the resulting solution is going to be too flat, and possibly brighter than I'd like. If I just changed the rug to a white/light gray material, then the room would loose some realism (there would be no red tint to the color bleeding...we want to decrease it, not remove it). If we use a desaturated red, so something pink-ish, for the rug material, then we'd be probably in a better situation.

ok how to do that in vraysr.. i know in vray max. you can create a vrayoveridde material and apply it on that particular face or object that is causing color bleeding. but in sr, there is an everride material, but is global. it will affect all the materials.. am i missing something here damien?

[dalomar_cg]

Re: Color Bleeding

I think your missing it too. We don't have the V-Ray Override Material yet, so you have to manually go through the steps. You're not applying an override material, rather, you're switching the normal material out for a different one in order to calculate your GI solution. Once you've switched your material, calculated your GI solutions, and saved them, you then need to switch your material back to the original one, set V-Ray to use those saved GI solutions, then render your final image.

[artchung]

Re: Color Bleeding

okok. i got you now. so basically i have to render the scene 2 times. 1st time without final render, but save the IR map. 2nd time render w/final render & use the saved IR map. also change the color of the material that causes the bleeding. cool!!let me try that. Thanks a lot Dalmor

[stefanq]

Re: Color Bleeding

If I may say something....art. the material that causes color bleeding, is the mat. who receive first hit of the light( sun)..probably the floor.

[artchung]

Re: Color Bleeding

good point there!! stefanq....great learning here. thanks. guys.

[nomeradona_cg]

Re: Color Bleeding

I think your missing it too. We don't have the V-Ray Override Material yet, so you have to manually go through the steps. You're not applying an override material, rather, you're switching the normal material out for a different one in order to calculate your GI solution. Once you've switched your material, calculated your GI solutions, and saved them, you then need to switch your material back to the original one, set V-Ray to use those saved GI solutions, then render your final image.

got it damien

[Devran]

Re: Color Bleeding

okok. i got you now. so basically i have to render the scene 2 times. 1st time without final render, but save the IR map. 2nd time render w/final render & use the saved IR map. also change the color of the material that causes the bleeding. cool!!let me try that. Thanks a lot Dalmor

Hi, can I solve this issue by checking the button in the material editor "exclude all objects from reflection/refraction"... bye devran

bv now it did not work hehehe...