[Radiance-general] Radiance output not satisfying radiosity equations

[Edward Zhang]

Hi,

I'm working on an inverse rendering project and we're using Radiance to
generate synthetic data for validation. Given a scene with diffuse
surfaces, we're using the radiosity formulation as the core of our inverse
process, namely that at any given scene point:

radiosity at point = (reflectance at point) x
sum_over_scene_points(radiosity at scene point x form factor between points)

The sum is calculated using a hemicube method (with suitably high
resolution) and the radiosities are obtained from reprojecting the .hdr
outputs of Radiance onto the scene geometry.

My problem is that even in simple box scenes this equation doesn't hold.
Most of the time, the reflectance estimated from this equation is too low.
I've used enough ambient bounces that the Radiance output has converged,
but I'm wondering if there are other Radiance rendering options that might
be causing these problems.

Thanks for your help!

Edward
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