Finally, after some bug fixes, additions, and extension to bidirectional mode, volumetric scattering is now available in unbiased modes (MLT/BiPT).
For the moment only homogeneous scattering is supported (since an inhomogeneous would require some different description based perhaps on particles).
Besides isotropic scattering, the following phase functions have been implemented: Rayleigh, Mie (for small dielectric particles) and Henyey-Greenstein.
greetings
giannis
Attachments
Rays coming from distant sun into an isotropic "dungeon" (MLT-PT render - scene by notareal)
Volumetric caustics produced by an area light and 3 dielectric spheres (BiPT renders). The Henyey-Greenstein scene has been rendered with extreme asymmetry 0.95
Ghianni is there not a way of producing such effects in a fast way in simple raytracing too, even if they would be not so accurate? In C4D there are some such things that render almost in no time. I suspect doing such things will make the already too slow unbiased methods even slower. They are very nice, no doubt, but they are so unpractical
the best alternative for volumetric caustics, is volumetric photon maps. Which actually can be quite accurate - at least for the homogeneous/isotropic cases.
For volumetric fog, we' ll enhance the current fog mechanism.
Beautiful, no matter the cost... well, almost.
what advantage over MLT/Bipt?