6 modules - PI-VR GmbH

6.4 RenderingMaps are updated for each image sample, sending a large number of photonsinto the scene. While this is necessary if final gather quality is set to 0 it isoften sufficient to update the Photon Map only once per frame and use it foreach image sample to reduce the render times.· On Each Sample: This updates the Photon Map for each image sample.This is the default setting since it also works for scenes with animatedobjects that may cause flickering otherwise.· On Scene Change: The Photon Map is updated once per frame only unlessmotion blur is activated. Since caustics require many photons, the CausticMap will still be updated for each sample while the indirect illuminationPhoton Map will only be updated once. This setting often results in thebest rendering performance but requires a much higher photon count toreceive artefact-free results, particularly when rendering scenes with animatedobjects, the result may flicker in regions with a low photon count.This is why this mode should only be used for scenes with static geometryand materials.• Use Final Gather For Glossy Reflections: If activated, glossy reflections arenot evaluated by path tracing but use the final gather map instead. Thisreduces the rendertime but results in less accurate reflections.» Lightsource Sampling Quality Settings:• Interactive: Sets the interactive lightsource sampling quality.• Still Frame: Sets the still frame lightsource sampling quality.» Reflection/Refraction Sampling Quality Settings:• Interactive: Sets the interactive sampling quality of reflections and refractions.• Still Frame: Sets the still frame sampling quality of reflections and refractions.» Trace Depth Settings:• Max Trace Depth: Sets the maximum amount of reflection and refractioneach ray may encounter.149