Exponent map doesn't seem to work as I expect.

zsouthboy · Post by **zsouthboy** » Sat Mar 31, 2007 10:09 am

Okay I think that it actually worked for me, however the combination of the lighting (I'm using the kitchen probe) and the bump map makes it look otherwise. I just happened to choose the worst possible test case to try this out. ROFL.

Post by **OnoSendai** » Sat Mar 31, 2007 4:53 pm

zuegs wrote:I tested the exponent-map for phong materials and i have to say that for me it seems to work
A=0 B=10000 C=10 and a nice 24bit-JPG with white text on black ground.

Yup... that's working.
And look: the c coefficient actually came in useful!

suvakas · Post by **suvakas** » Sat Mar 31, 2007 10:07 pm

Will it ever work like "common" texture map without the need to know all this space science stuff like those A's, B's and C's?

Kram1032 · Post by **Kram1032** » Sat Mar 31, 2007 10:21 pm

A B and C just wors as spectral exponent, multiplier and adder, or?
C makes brighter
B makes wider
A makes extremely much wider

For a good use, this is reqired, I guess, as there only are 256 greyscaled steps... You have to define, how they are used. If you don't do this, it will be very hard, to use a map correctly, sometimes... I guess, at least...
(I finally understood A B and C,

)

Maybe you could use greyscaled .exr ? For more accuracy....
(If that works....)

Zom-B · Post by **Zom-B** » Tue Apr 24, 2007 3:20 am

can somebody please post some example code for exponent map?! please!