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The ambient occlusion map (middle image) for this scene darkens only the innermost angles of corners. In 3D computer graphics, modeling, and animation, ambient occlusion is a shading and rendering technique used to calculate how exposed each point in a scene is to ambient lighting. For example, the interior of a tube is typically more occluded ...
Screen space ambient occlusion (SSAO) is a computer graphics technique for efficiently approximating the ambient occlusion effect in real time. It was developed by Vladimir Kajalin while working at Crytek and was used for the first time in 2007 by the video game Crysis, also developed by Crytek.
Ray-traced ambient occlusion is a computer graphics technique and ambient occlusion global illumination algorithm using ray-tracing. [1] [2] [3] References
Screen space directional occlusion (SSDO) is a computer graphics technique enhancing screen space ambient occlusion (SSAO) by taking direction into account to sample the ambient light (both the light coming directly at an object, as well as the light reflected off of the object directly behind it), to better approximate global illumination.
Ray-traced ambient occlusion; S. Screen space ambient occlusion; Screen space directional occlusion; V. Volumetric path tracing
Screen space ambient occlusion; Screen space directional occlusion; Self-shadowing; Shade (shadow) Shadeop; Shader; Shading coefficient; Shadow mapping; Shadow volume; Solar gain; Specular highlight; Spherical harmonic lighting; Stars (shader effect)
Ambient lighting can be combined with ambient occlusion to represent how exposed each point of the scene is, affecting the amount of ambient light it can reflect. This produces diffused, non-directional lighting throughout the scene, casting no clear shadows, but with enclosed and sheltered areas darkened.
A variety of techniques including ambient occlusion, direct lighting with sampled shadow edges, and full radiosity [4] bounce light solutions are typically used. Modern 3D packages include specific plugins for applying light-map UV-coordinates, atlas-ing multiple surfaces into single texture sheets, and rendering the maps themselves.