hi all 
always when i do interior rendering i have a bad illumination in some areas like some black areas or blotches i feel that area is not clean. how i can get rid of that. i attached my interior scene
this is the render link
You don’t give any details of your settings so its difficult to see what the problem is.
(In fact I would say your image is looking pretty good)
What I can say is that for the following image I used IM/LC
IM -5,-2 HSph 80, samples 30
LC SubDiv 600, samples size 0.02 and depth 100
and it was rendered at 3200 pix wide.
basically if you have blotches, theres only a few things you can do.. the main one being increase the hsph. subdivs
David
will this be useful Nomeradona SketchUp VR: Trick: Removing Splotches in Vray Sketchup
hey man, i think you came to the right place… the forum has not had a lot of activity for a while, but in order to give you a hand, you should provide more info about your model, settings and everything.
great response nomer, as always hehe.
see you guys around.
Hi Guys
We have two type of noise in V-Ray, one is the small noise that are produced by image samples and shadows or glossy materials. These type of noise can be removed through the color threshold, light sudbivis or material subdivs. The other type of noise is the large splotches like you have in your render that is produced by a bad GI solution. When I said GI solution I’m referring to what ever you have on the indirect illumination panel and their respective setting. For example (Irr and LC). On thing that produce a lot of GI splotches is the emissive light. If you have a very bright emissive light you will have a lot of splotches and you will have to do what Nomer explain in their video. The problem with that is that you will also increase your rendering time. If you have emissive material, the solution is use a small multiplier just enough to show the light source in the render, then place rectangular lights or omni lights to produce the illumination.
If you don’t have emissive light, then the issue could be due a low GI solution, so you will have to trow more samples using the min and max rates and also increase the quality of the samples using the HSph Subdiv.
Best
hmmm, i see you got your help,lol, also make sure adaptive amount in DMC sampler is .85 or a little lower, it means an increase in render time but worth it
This is another jewel. Thanks Fernando. We have more ideas whats happening inside the vray engine.