Improve PCF13 shadow rendering in GLES2 by using a soft PCF filter #46301
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Calinou
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clayjohn
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This suppresses the blocky shadow appearance, bringing the shadow rendering much closer to GLES3. This soft filter is more demanding as it requires more lookups, but it makes PCF13 shadows more usable. The soft PCF filter was adapted from three.js.
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akien-mga
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This suppresses the blocky shadow appearance, bringing the shadow rendering much closer to GLES3. This soft filter is more demanding as it requires more lookups, but it makes PCF13 shadows more usable.
Preview
Before (PCF13)
After ("PCF16 Soft" as PCF13)
In motion
The directional shadow size was set to 2048 (instead of the default 4096) to make the smoothness more visible.
d.mp4