Physical basis for bump map gain?

Whaat · Post by **Whaat** » Tue Jun 12, 2007 9:00 am

I understand how Indigo calculates the value of the bump map (quadratic function with a,b,c coefficients...). My question is, does the final value for a given pixel, correspond to a physicial dimension? For example, if the quadratic function calculated at a given pixel is equal to 0.03, does that mean that the point on the surface is in effect raised a distance of 0.03 meters (or some other unit...)??
I expect not. Still, it would be nice if there was some way to correlate the bump map gain to a real-world value. It would definitely help beginners find the correct value quicker.

Whaat

Kram1032 · Post by **Kram1032** » Wed Jun 13, 2007 1:26 am

the b-value gives the height, I thought...

Whaat · Post by **Whaat** » Wed Jun 13, 2007 5:05 am

Kram1032 wrote:the b-value gives the height, I thought...

OK, but with what units? meters?

deltaepsylon · Post by **deltaepsylon** » Tue Jun 26, 2007 1:20 pm

probably. cuz like, in blendigo, 1 blender unit = 1 real world/indigo meter. so probably, dunno, i think its in meters.

Kram1032 · Post by **Kram1032** » Tue Jun 26, 2007 8:14 pm

yes, I guess so, dunno, exactly, though.
I think, noone asked that before but simply did trial-error xD

Physical basis for bump map gain?

Physical basis for bump map gain?

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