nanasba13 Posted January 22, 2011 Share Posted January 22, 2011 Studio/Institution: Vrotsos ArchitectureGenre: Residential InteriorSoftware: 3Ds Max - V-RayWebsite: http://www.vrotsos.grDescription: Hey guys, could somebody help me? Why the weird blotches? The render was done with very simple settings just for a test, and I think they might be because of the light subdiv's but I'm not sure, if anyone could share some light on the matter I'd appreciate it! Thanks! Link to comment Share on other sites More sharing options...
acjwalker Posted January 22, 2011 Share Posted January 22, 2011 have you got clamp out put ticked? Link to comment Share on other sites More sharing options...
nanasba13 Posted January 22, 2011 Author Share Posted January 22, 2011 have you got clamp out put ticked? No! Should I? Link to comment Share on other sites More sharing options...
acjwalker Posted January 22, 2011 Share Posted January 22, 2011 Yes Link to comment Share on other sites More sharing options...
nanasba13 Posted January 22, 2011 Author Share Posted January 22, 2011 Yes Okay I'll give it a try, thanks! Have a nice weekend! Link to comment Share on other sites More sharing options...
Ismael Posted January 22, 2011 Share Posted January 22, 2011 Maybe there is an answer and or a solution here: http://www.chaosgroup.com/forums/vbulletin/showthread.php?39585-Little-white-artifacts-how-to-get-rid-of-them&highlight=clamp+output Link to comment Share on other sites More sharing options...
Ismael Posted January 22, 2011 Share Posted January 22, 2011 Quotes from the forum entry: “As you see, in various little areas I have very small zones that are overbright and outlined in black. It is of course very annoying. Could you tell me what causes this and how to prevent it ? Thanks a lot for your help.” Theedge “this is due to using a sharpening image filter. Try to avoid them (simply said, they got negative values in their filter curves. VERY bright spots (like sun reflections) get multiplied by that and hence turn black instead.) Regards,” Thorsten “Ah ok I see. That's too bad as i like the overall look of the render with sharpening image filters. I'll try to stick with softening ones and work out sharpening in photoshop. Thank you instinct” Theedge “The bright spots are reflections/hilights from the sun. You can also use the clamp output/subpixel mapping options in the Color mapping rollout to deal with the issue. Best regards,” Vlado The bug hunt continues... If you find a bug - report it “Ok, let me see if I'm starting to understand this part of of v-ray now : If I enable color clamping, then it would be pointless to save my image as exr float, as any value beyond 1.0 would simply be ignored. Right ??” Theedge “yes and no. Yes all values beyond 1 would be clamped. Wich doesnt mean float would be pointless. The color-depth between 0 and 1 is still a LOT higher then with 8 or 16 bit. Actually mathematically there are more possible values between 0 and 1 then between 1 and Infinity with Floating Point hehehe Regards,” Thorsten “Oh yes ! I missed that point instinct ! there are indeed only 255 possible values between 0 and 1 in the 8 bit format, while there are much more in 16 bits (256x256) and even more in 32 bits” Theedge “That usually goes away for me when I make my sun invisible In Christ,” Bobby W Parker Link to comment Share on other sites More sharing options...
nanasba13 Posted January 24, 2011 Author Share Posted January 24, 2011 Many thanks guys, solved it by clamping it, but have to look into .exr and If I enable color clamping, then it would be pointless to save my image as exr float, as any value beyond 1.0 would simply be ignored. Right ??” Theedge “yes and no. Yes all values beyond 1 would be clamped. Wich doesnt mean float would be pointless. The color-depth between 0 and 1 is still a LOT higher then with 8 or 16 bit. Actually mathematically there are more possible values between 0 and 1 then between 1 and Infinity with Floating Point this since I am not familiar with it. Also heard somewhere about clamping renders LWF useless, or something like that! Have to do more research, anyway thanks again! Link to comment Share on other sites More sharing options...
heni30 Posted January 25, 2011 Share Posted January 25, 2011 You could keep what you like and just render that problem area with different settings then cut and paste in PS. Link to comment Share on other sites More sharing options...
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