CGarchitect.com - View Single Post - Radiosity, Logarithmic Exposure Control, and Bitmaps

June 25th, 2002

Howdy, I'm looking everywhere for an answer to this issue:

I'm rendering a radiosity solution, which of course works best with logarithmic exposure control. HOWEVER, I just tried mapping a bitmap image to be used as a poster on the wall, and logarithmic exposure causes the image to be rendered incorrectly. It is not just washed out; the suggestion to reduce it's RGB values will not work because logarithmic appears to be performing a curves adjustment on the RGB values, in effect solarizing the image. How in the world can I place a bitmap image in a radiosity solution that will look correct? I'VE TRIED EVEYTHING!

I've gotten hints from other newsgroups that placing bitmaps (full ones meant to be seen as an image, not as a texture) in radiosity solutions is actually something that you just can't do in Viz 4. Is this true? I can't believe it....

Thanks in advance!

June 25th, 2002	#1 (permalink)
Matthew Boorstin Guest Posts: n/a Name:	Howdy, I'm looking everywhere for an answer to this issue: I'm rendering a radiosity solution, which of course works best with logarithmic exposure control. HOWEVER, I just tried mapping a bitmap image to be used as a poster on the wall, and logarithmic exposure causes the image to be rendered incorrectly. It is not just washed out; the suggestion to reduce it's RGB values will not work because logarithmic appears to be performing a curves adjustment on the RGB values, in effect solarizing the image. How in the world can I place a bitmap image in a radiosity solution that will look correct? I'VE TRIED EVEYTHING! I've gotten hints from other newsgroups that placing bitmaps (full ones meant to be seen as an image, not as a texture) in radiosity solutions is actually something that you just can't do in Viz 4. Is this true? I can't believe it.... Thanks in advance!