In 'What's New in POV-Ray 3.5?' ... 2.6.1   Noise Changes 2.6.2   Photons, Dispersion and Improved Radiosity 2.6.3   New Light Source Types and Light Groups 2.6.4   Isosurface and Parametric Objects 2.6.5   Sphere Sweep Object 2.6.6   New More Compact Mesh Object & Solid Mesh 2.6.7   UV Mapping 2.6.8   Improved Textures 2.6.9   Improved and Faster Media 2.6.10   New Patterns 2.6.11   New Functions 2.6.12   Additional New Features 2.6.13   Bug Fixes and Enhancements 2.6.14   Changed features that may 'break' old scenes 2.6.15   New Keywords