Pixelated Shadow Edges

shotsy247 · January 25, 2006, 9:45am

Hi All,

I’m sure this is a very easy problem, but I have no clue. I’ve searched for the answer but I guess my search critira are wrong.

I am creating an animation that uses a spot light with the buf.shadow property turned on.

The problem I am having is that shadows are all pixelated along the edges. Nothing else in the image is this way, what is causing this with my shadows?

Thanks.

_t

dschnell289 · January 25, 2006, 9:47am

do you have OSA turned on?

shotsy247 · January 25, 2006, 9:49am

Yes. The OSA button is on.

That should make the image render at least 5 passes before it is finised correct?

_t

dschnell289 · January 25, 2006, 10:06am

you won’t see it render more than once with osa on…are you thinking of the mblur (motion blur) button which will render it X (determined by osa setting) times.
Set your osa filter type to gaussian (in the render panel of F10 window…there’s a combo box type control inbetween “fields” and “Border” buttons.

shotsy247 · January 25, 2006, 10:17am

Yeah I guess I am thinking of MBLUR, as to the multipass reneder. I did have the OSA button on. I do have it set to Gauss, with a value of 1.00.

And still very pixelated shadow edges.

_t

Ryz · January 25, 2006, 10:33am

Increase shadow buffer size and/or number of samples…

shotsy247 · January 25, 2006, 12:00pm

That seems to have been the problem.

Thanks to all.

_t

toontje · January 25, 2006, 4:53pm

The thumb of rule though is that when you increase the shadow buffer above 2048, you’d be better off by raytracing the scene. That is what Jeremy Birnn said anyway in his book.