6 modules - PI-VR GmbH

6 MODULESreproduce the rendering results with realistic luminance information on thedisplay. Therefore, it is necessary to set up the dispay luminance parameterto match the current display, preferably using measured data. Also, theclamping threshold and the tone mapping parameters of the cameras are tobe adjusted accordingly.• Optimize for Many Light Sources: In scenes with many light sources or geometrylight sources rendering may slow down. Activating this flag allowsthe renderer to optimize the light calculation by reducing the quality slightlywhich significantly speedsup rendering. While you don’t recognize the qualityloss in most situations, there may be scenes that may suffer from heavynoise when this feature is turned on. In such scenes you may need to disablethe optimization to get a clean render result.• Number of CPU Cores: Sometimes you may want to limit the number ofraytracing cores VRED uses to have some processing power left for otherapplications. This settings is a runtime only setting and it does not influenceany cluster machines.» Raytracing Quality184» Illumination Mode: VRED has various illumination modes for rendering in raytracing.You may choose different illumination modes for interactive renderingand still frame rendering. This allows to work in a precomputed mode for fastinteraction with the scene and automatically switching to full global illuminationfor still frame rendering. Four modes are available:• Precomputed Illumination: The precomputed illumination mode is comparableto VRED OpenGL rendering mode. It uses precomputed ambient occlusionand indirect illumination for rendering and calculates specular reflectionsand refractions and correct shadows from lightsources.• Precomputed + Shadows: The Precomputed + Shadows Mode uses precomputedimage based lighting and indirect illumination but doesn’t use precomputedAmbient Occlusion values. Instead it calculates shadows based on theactive environment.