Black spots

[Nicolaas]

Hi guys,

Long time no c...

My first render of a new scene turned out with black spots...
I had it in rerenders of old stuff as well.. tilting the camera made it happen to get rid of it.. anyway.. not here... no materials yet added.
Anybody knows what it is ?

Thx in advance
Nicolaas

[Syclone1]

Yea Ive been getting that also lately but still not sure whats causing it.

-dave

[gilicom]

Yeah I get it too latley...
somone know?

[natty]

This often happens when you Interp sample are to low .. hole's start to appear in the irr map.

[Nicolaas]

And who do we got here ???
Natty of course..
Thx mate..
I used 15 for it.. what should do it 20 ? 25 ?

Thx
Nicolaas

[Syclone1]

I think mine were at 20 along with the higest quality preset for the IR settings.

-dave

[natty]

hi..... i use 25 min.. the higher the levels the blury'er the irr map ... lower the sharper ..

[Syclone1]

Tkx natty, Ill give that a shot when I can get a chance...

-dave

[vaslavo]

well maybe a little help, it happends to me when i got a clipping camera cutting some object, my solution was to be sure that the camera isnt cutting any geometry at all.

[egz]

Which sample lookup type are you using? Try changing it to density based if you are not already using that.

[Gijs]

Maybe not the case here, but in case you get black areas with coincident faces, you can use a secondary ray bias value of about 0.001. This has helped me a few times to get rid of black areas.

[natty]

he has already said ......

I used 15 for it.. what should do it 20 ? 25 ?

15 is too low !

[Nicolaas]

Here is the updated version...
I set my IR interpolation to 40 and calculation samples to 25.
Got rid of it... anyway... here's the final version.. only 1 time rendered due to time, but I need better material for gold suggestions ? FOrgot ward with my material but anyway.. what sould be better done.. ?

Thx in advance..

PS: added also a rerender of my early kitchen wip and got black faded spots in my glass, ceiling and curtain. Also my sink has some error in its geomatry why I don't know because I copied the right one maybe a hundred times to the left. anyway..

[vlado]

To avoid the black holes you can use the "Density based" sample look-up mode.

Best regards,
Vlado

[natty]

"Density based" sample look-up mode

dont you have to produce more sample's for that Look up method ?