 Rendering equation (source code)

by Codex (@codex,  0)

= Rendering equation
{title2=$L_o=L_e+\int_{\Omega^+}f_rL_i\cos\theta_i\,d\omega_i$}
{wiki}

A balance of emitted and reflected <radiance> at a surface. A <bidirectional reflectance distribution function> weights incident <radiance> from each direction, and a cosine accounts for projected <area>. Indirect illumination makes the incident field depend on other surfaces.

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