Rendering with HDR probes

radiance-general
1

I've been playing with Paul Debevec's image based rendering and had some
questions..

http://www.geocities.com/rastermon/StPeters.html
I've rendered these images with rif settings:

QUALITY=h
RESOLUTION=1024 1024 0
REPORT= 10 house.err
INDIRECT= 3
PENUMBRAS= F
DETAIL=h
VARIABILITY= h
AMBFILE= house.amb
render= -av .1 .1 .1

Why is it so spotty? the HDR is 1500 x 1500 pixels - could res effect the
quality?

I've also notice that I'll need to rotate the glowing HDR box 90 degrees on
X (I think)

Any tips? I'm sure there are people who have used this well.

Thanks
Rob Fitz

2

Hi Rob,

The most probably cause of spots from image-based lighting is the concentration of illumination from certain small areas. You need to discover these somehow and convert them to illum's or light's or else increase your -ad parameter to something very large (and increase -as while you're at it) to integrate them properly.

-Greg

ยทยทยท

From: "Fitzsimmons, Rob" <Rob.Fitzsimmons@Summit.Fiserv.com>

I've been playing with Paul Debevec's image based rendering and had some
questions..

http://www.geocities.com/rastermon/StPeters.html
I've rendered these images with rif settings:

QUALITY=h
RESOLUTION=1024 1024 0
REPORT= 10 house.err
INDIRECT= 3
PENUMBRAS= F
DETAIL=h
VARIABILITY= h
AMBFILE= house.amb
render= -av .1 .1 .1

Why is it so spotty? the HDR is 1500 x 1500 pixels - could res effect the
quality?

I've also notice that I'll need to rotate the glowing HDR box 90 degrees on
X (I think)

Any tips? I'm sure there are people who have used this well.

Thanks
Rob Fitz