Unified sun and sky illumination for shadows under trees

Fast calculation of soft shadow textures using convolution

Proceedings of the 25th annual conference on Computer graphics and interactive techniques

Conservative visibility preprocessing using extended projections

Proceedings of the 27th annual conference on Computer graphics and interactive techniques

Texture-based visibility for efficient lighting simulation

ACM Transactions on Graphics (TOG)

Synthesizing bark

EGRW '02 Proceedings of the 13th Eurographics workshop on Rendering

Shadow penumbras for complex objects by depth-dependent filtering of multi-layer depth images

EGWR'99 Proceedings of the 10th Eurographics conference on Rendering

Instant convolution shadows for volumetric detail mapping

ACM Transactions on Graphics (TOG)