Default shadow settings: 1024px, 3 Cascades, 4x4 Atlas (16 slots), 8k Max Texture.

Sets the grid size (N x N) of the shadow atlas texture. Determines the total capacity for shadow casting lights (Total Slots = N * N).

Tunable bias values to prevent shadow mapping artifacts. 'bias': Constant depth offset to prevent acne (self-shadowing). 'normalBias': Offset along the geometric normal to cure acne on curved surfaces without inducing Peter-Panning (detached shadows).

Sets the number of cascades for directional light shadows (typically 3 or 4). More cascades improve shadow sharpness at various distances but increase the number of draw calls per directional light.

Sets a hard limit on the shadow atlas texture size in pixels (e.g., 8192). Prevents the system from allocating too much VRAM. If (Resolution * Tiles) exceeds this, individual shadow maps will be downscaled.

Sets the maximum number of point lights that can cast shadows. Note: This is largely superseded by 'withAtlasTiles', which determines the total slot capacity.

Sets the number of PCF samples for soft shadow filtering (e.g., 16). Higher sample counts create smoother soft shadows but are more expensive to compute in the pixel shader.

Sets the resolution of a single shadow map slice (e.g., 2048). Higher values reduce aliasing (jaggies) but increase VRAM usage and GPU memory bandwidth.

Enables the soft shadow code path in the shader. 'penumbra' controls the physical size of the light source, determining how blurry the shadows get with distance.