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Tag Archives: Lighting
Journey to Lumen
Real-time GI has always been a holy grail of computer graphics. Over the years there were multiple approaches to this problem. Usually constraining problem domain by leveraging certain assumptions like static geometry, too coarse scene representation or tracing from coarse … Continue reading
Analytical DFG Term for IBL
Image-based lighting is an important part of a physically based rendering. Unfortunately straightforward IBL implementation for more complicated lighting models than Phong requires a huge lookup table and isn’t practical for real time. Current state of the art approach is … Continue reading
Lightmapping in Anomaly 2 mobile
In 2013 Anomaly 2 mobile version (iOS/Android/Blackberry) by a small indie studio 11 Bit Studios was released. It was an interesting project as we needed to run heavy content from PC version on much weaker mobile platforms. I’d like to … Continue reading
Unreal Engine 4 gaussian specular normalization
Recently Epic did a nice presentation about their new tech: “The technology behind Unreal 4 Elemental demo“. Among a lot of impressive stuff they showed their gaussian specular aproximation. Here is a BRDF with U4 specular for Disney’s BRDF explorer: This … Continue reading
Aggregated deferred lighting
Random idea about a new way to do deferred lighting. The idea is to decouple lighting from geometry normals. In order to do that, lighting information is stored as aggregated lights ( direction + color ). 1st pass – z-prepass … Continue reading
Rendering Light Geometry for Deferred Shading/Lighting
Interesting idea from Call Of Juarez 2 about rendering deferred light geometry. When deferred light geometry intersects with camera you need to switch culling and turn off zbuffer. In COJ2, instead of testing intersection on CPU and switching states, they … Continue reading
Krzysztof Narkowicz 