GPU Thread ComputeShading (From GDC)
https://www.gdcvault.com/play/1023808/Rendering-Antialiased-Shadows-with-Moment
Shadowmap sampling document
Shadow map sampling ● Diminish undersampling with a better shadow map projection, e.g.: ● Trapezoidal shadow maps [Martin04], ● Cascaded shadow maps [Zhang06], ● Sample distribution shadow maps [Lauritzen11]. ● Helps a lot, but not enough, ● Not our topic today.
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