6 modules - PI-VR GmbH

4 PREFERENCESputed Ambient Occlusion values. Instead it calculates shadows based on theactive environment.» Precomputed + IBL: The Precomputed + IBL Mode uses precomputed indirectillumination and samples the environment. It replaces the old Fast Global Illuminationmode.» Full Global Illumination: The Full Global Illumination Mode doesn’t use anyprecomputed values but accurately samples the global lighting distribution ina physically-based approach. Please note that other features like Photon Mappingrequire the render mode to be set to Full Global Illumination.» Photon Tracing Photon Tracing is an approach to calculate the global illuminationin a scene. The default full global illumination mode in VRED provideshigh quality results but may require longer calculation times. Photon Tracingcan reduce the time required to render a clean image by a larger margin, especiallyin indoor scenarios like car interieurs or architectural indoor scenes. VREDallows different Photon mapping modes.70» Mode:• Off: Disables Photon Tracing and uses the default full global illuminationalgorithm in VRED.• Indirect Only: Uses photon tracing to calculate the indirect illumination ina scene. This is the most common mode.• Caustics + Indirect: Uses Photon Tracing to calculate indirect illuminationand caustics due to specular materials in a scene.» Interactive/Still Frame Count: The two photon count values specify the numberof photons being sent into the scene for each image sample. Specifying aphoton count of 100.000 photons while having set the image samples set to256 will result in 25.600.000 photons send into the scene for a frame. Morephotons result in smoother results.» Lookup Radius: The lookup radius specifies the radius around a scenes’s hitpointused by the raytracer to find photons around the hitpoint. A larger ra-