Wired smug appear in my ceiling ...How to remove it ?

[yohozindagi1]

I have rendered this image using Vray Rc 1.5 in 3ds max 2009

The problem is I am getting wired smuggie shades in the ceiling corners... i really don't know why its appearing ..... Can anyone plz help me solve this problem ... I have attached the image below..PLZ help

[aristocratic3d]

Please post screen shot from your render setup.

[Ricardo Eloy]

Looks like bad modeling and/or poor GI.

 

 

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[neil poppleton]

looks like light leaking from outside the room, double check the model

[aristocratic3d]

I agree with neil. check the model.

[jophus14]

It's from your geometry. Convert your moulding to an editable poly, select the face in polygon mode, go down in the modifier stack to "Polygon: Smoothing Groups" and tick the "Clear All" button. This should help out the dark spots.

[aristocratic3d]

Poor GI causing the issue. and also maybe poor modeling. But I cant agree with Joseph. its not a smoothing group issue.

[BETA]

tray this set up man

[yohozindagi1]

Thankx everyone a lot for the help but .... if poor GI is the issue than why is rest of the scene looks alright ? why only the ceiling looks bad ???

Can u also kindly answer this ?

- Thank you

[neil poppleton]

have you double checked the model first

[erickdt]

Thankx everyone a lot for the help but .... if poor GI is the issue than why is rest of the scene looks alright ? why only the ceiling looks bad ???

Can u also kindly answer this ?

- Thank you

 

Because your cieling is recieving primarily indirect/bounce light where as the rest of your scene is, for the most part, recieving light directly from light objects. Since the cieling is almost entirely dependant on the GI solution for its illumination it requires a better quality GI solution to render correctly.

 

E

[Joseph Petrino]

There is a lot of varying opinions from knowledgeable people so I'm reluctant to suggest anything....

 

But, I get that kind of noise when my lightcache settings are too low.

[Tommy L]

i think you added that geometry after you did your gi calcs. either that or you accidentally cloned it so its co-planar....or maybe its a non-native material.

[ruskie77]

Light leaks like these are normally (in my experience) caused by geometry cutting through each other or co-planar faces.

 

you could try to put a bit of blocking geometry outside the room, or tweak the "shadow bias" up a bit, on the light settings. this can help prevent this problem.

 

the max file has a good explaination for shadow bias settings..

[ruskie77]

also... to prevent the clumping in your shadows, try increasing the Hsph subdivs in your IRmap rollout to around 80-100..and interp samples to 40-60...

[heni30]

As a quick fix, if every thing is straight, I would snap the tops of the walls to the bottom of the crown molding and the edges of the ceiling to the outer edge of the crown molding.

[DennisHolland]

The ceiling looks bad because it catch all the outside lighting power from above and that generate those leaks. Clean up your model, increase your samplings in the render rollout...