6 modules - PI-VR GmbH

4 PREFERENCESblur is activated. Since caustics require many photons, the Caustic Map willstill be updated for each sample while the indirect illumination Photon Mapwill only be updated once. This setting often results in the best renderingperformance but requires a much higher photon count to receive artefactfreeresults, particularly when rendering scenes with animated objects, theresult may flicker in regions with a low photon count. This is why this modeshould only be used for scenes with static geometry and materials.» Use Final Gather for Glossy Reflections: If activated, glossy reflections are notevaluated by path tracing but use the final gather map instead. This reduces therendertime but results in less accurate reflections.» IBL Sampling Quality» Interactive: Sets the interactive IBL sampling quality.» Still Frame: Sets the still frame IBL sampling quality.» Reflection/Refraction Sampling Quality» Interactive: Sets the interactive sampling quality of reflections and refractions.» Still Frame: Sets the still frame sampling quality of reflections and refractions.» Trace Depth» Interactive: Sets the interactive trace depth settings.» Still Frame: Sets the still frame trace depth settings.» Photon Tracing Notes and Tips Photon Tracing has its main advantages ininterior scenes. In exterior scenes most of the light illuminates the scene directly,the default full global illumination mode in VRED shows the best performance inthis case.Be aware that the number of photons emitted doesn’t resemble the number ofphotons actually stored. If a photon misses the scene it will not be stored. Aphoton bouncing several times in a scene might be stored more than once. Tokeep the number of emitted photons as low as possible, place any light emitters72