Numbers of what precision are used by Mantra at rendering? And whether this precision is constant or it is various at different stages of the rendering process?
The question interests in view of a theoretical opportunity of use of Cell processors for rendering. As is known, SPEs of Cell are able to process numbers with 32bit FP accuracy for 1 tact . And 64bit FP numbers need 7-14 tacts. Whether enough 32bit FP precision for needs of rendering?