Computer Graphics

Real-Time Shading

Getting a usable approximation of the above inside a frame budget.

• supersedescorrects · extends
• classifiesspecializes · part-of
• substitutes forapproximates · alternative-to
• depends onrequires · validates

Colour is the family; a dashed line is the second member of it.

The 19 reasons on these edges, as text

• approximatesAmbient Occlusion is a cheaper stand-in for The Rendering Equationone visibility scalar instead of an indirect bounce
• correctsClustered / Tiled Shading fixes a defect in Deferred Shadingevery light otherwise touches every pixel it covers
• alternative-toDeferred Shading is a competing approach to Forward Shadingshades once per pixel, not once per overlapping fragment
• correctsDynamic Diffuse Global Illumination fixes a defect in Irradiance Probesplain probe interpolation leaks light through walls
• specializesForward Shading is a specific case of Rasterizationshades each fragment as its triangle is filled
• part-ofG-Buffer is a subtopic of Deferred Shading
• correctsGround-Truth Ambient Occlusion fixes a defect in Horizon-Based Ambient Occlusionearlier estimators were never normalized to ground truth
• correctsHorizon-Based Ambient Occlusion fixes a defect in Screen-Space Ambient Occlusionpoint sampling ignores the actual horizon of the surface
• approximatesImage-Based Lighting is a cheaper stand-in for The Rendering Equationdistant incoming radiance baked into a single map
• approximatesIrradiance Probes is a cheaper stand-in for Irradiance Cachinga fixed grid instead of adaptively placed samples
• approximatesLightmaps is a cheaper stand-in for Radiositybakes the converged solution into textures
• approximatesLinearly Transformed Cosines is a cheaper stand-in for Microfacet Modelmakes area-light integrals closed form
• approximatesPrefiltered Environment Map is a cheaper stand-in for Image-Based Lightingprefilter per roughness instead of sampling at runtime
• specializesScreen-Space Ambient Occlusion is a specific case of Ambient Occlusionestimated from the depth buffer at runtime
• approximatesScreen-Space Reflections is a cheaper stand-in for Specular Reflectionreuses the frame buffer instead of tracing the scene
• approximatesSpherical Harmonics Irradiance is a cheaper stand-in for Image-Based Lightingnine coefficients capture all diffuse irradiance
• approximatesSplit-Sum Approximation is a cheaper stand-in for Microfacet Modelsplits the integral into two precomputable factors
• requiresSplit-Sum Approximation does not work without Prefiltered Environment Mapone of the two factors is the prefiltered map
• correctsVisibility Buffer fixes a defect in Deferred Shadingfat G-buffers are bandwidth-bound at high resolution

18 nodes