Global Illumination/Raytracing

changelog from 4.8.9 to 4.9.1:

4.9.1

• Improved the new offline renderer preview and output stability.
• Fixed saved render images being vertically flipped.
• Fixed render framing/camera mapping so the offline render matches the current view much more closely.
• Fixed directional/sun light contribution in offline rendering.
• Fixed path-tracing striping/banding artefacts.
• Fixed stale previous-pass/block artefacts in progressive rendering.
• Fixed render-window preview sizing so the preview no longer grows to the full internal buffer size.
• Added render size presets while keeping the preview window at a manageable fixed display size.
• Added a global render light level control for both raytrace and GI/path-trace.
• Added camera light intensity control.
• Added an option to disable tile pruning, with pruning now off by default.
• Improved transparent-material rendering so transmitted rays:
  • pass through transparent surfaces,
  • are tinted by material color,
  • and are dimmed according to alpha.

4.9.0

• Added a new Rendering toolbar and render window.
• Added two offline rendering modes:
  • Raytrace
  • GI / Pathtrace
• Added progressive rendering passes from coarse to fine, ordered from image center toward the borders.
• Added Stop and Save controls for offline rendering.
• Added live compositing of the offline render over the captured GPU framebuffer.
• Added blur and blend controls for the render overlay.
• Added simple glass transmission/refraction support.
• Added desktop/Android parallel tile rendering with worker pool support.
• Kept web rendering on the single-threaded fallback path.
• Added worker-count control in the render window.
• Added resolution display in the render window.

Shorter store/update-note version:

• Introduced a new offline rendering window with Raytrace and GI/Pathtrace modes.
• Added progressive center-out rendering, save/stop controls, worker-count control, size presets, blur/blend controls, and adjustable lighting.
• Improved transparency handling for glass-like materials.
• Fixed multiple offline renderer issues including framing, lighting, vertical save flip, striping, and progressive pass artefacts.