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#ActualB_old

Posted 26 November 2012 - 02:50 PM

I have a question about the "Valve ambient cube" and what it actually stores. In my implementation I store the average of one 90 degree fov image per (pixel-)face of the ambient cube (weighted by solid angle). According to the formula, axis aligned vectors will look up exactly on face of the cube which means, that I don't cover the entire hemisphere with my sample.
Is that by design or do I actually need different values in my ambient cube, so that each face is the average of the entire hemisphere around that side? Which doesn't really make sense to me, because than the cube would store too much energy so to speak.

#2B_old

Posted 26 November 2012 - 02:50 PM

I have a question about the "Valve ambient cube" and what it actually stores. In my implementation I store the average of one 90 degree fov image per (pixel-)face of the ambient cube (weighted by solid angle). According to the formula, axis aligned vectors will look up exactly on face of the cube which means, that I don't cover the entire hemisphere with my sample.
Is that by design or do I actually need different values in my ambient cube, so that each face is the average of the entire hemisphere around that side? Which doesn't really make sense to me, because than the cube would store too much energy so to speak.

#1B_old

Posted 26 November 2012 - 12:39 PM

I have a question about the "Valve ambient cube" and what it actually stores. In my implementation I store the average of one 90 degree fov per pixel-face of the ambient cube (weighted by solid angle). According to the formula axis aligned vectors will look up exactly on face of the cube which means, that I don't cover the entire hemisphere with my sample.
Is that by design or do I actually need different values in my ambient cube?

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