A shadow sampling technique using a 32-bit shadow map that adjusts filter size based on blocker
distance, producing realistic, soft shadow edges that vary with the light's occlusion. Note that
this technique requires both GraphicsDevice#textureFloatRenderable and
GraphicsDevice#textureFloatFilterable to be true, and falls back to
SHADOW_PCF3_32F otherwise.
A shadow sampling technique using a 32-bit shadow map that adjusts filter size based on blocker distance, producing realistic, soft shadow edges that vary with the light's occlusion. Note that this technique requires both GraphicsDevice#textureFloatRenderable and GraphicsDevice#textureFloatFilterable to be true, and falls back to SHADOW_PCF3_32F otherwise.