On 1/25/11 11:47 AM, "Christian Bloch" <[email protected]> wrote:
>- IBL needs sampling settings beyond insane. >Ultimately, these concentrated light sources are perfect examples of >direct illumination sources. Brute-forcing this through a GI render >pipeline makes little sense. It's much more efficient to represent these >concentrated light sources with actual 3d lights, and in turn limiting >the DR in the environment map. Also gives you more artistic control over >shadows. Some people like to paint out direct light sources completely, >but I prefer blurring them out with the rest of the environment to keep >some ambient contribution (think hazy spill light). Radiance includes a tool called mksource to address this. Mksource samples an HDR environment map and creates direct Radiance light sources to represent bright concentrated regions found in the map, moving much of the flux to the direct calculation -- more efficient and less artifacts. _______________________________________________ HDRI mailing list [email protected] http://www.radiance-online.org/mailman/listinfo/hdri
