Rayrai Example: Nested Glass

Overview

The in-process Rayrai example traces a water-filled glass with an enclosed air bubble, an empty hollow cup, a concave amber torus, and two overlapping tinted glass solids. The media have explicit indices of refraction and dielectric priorities so overlapping interfaces resolve in a defined order. The default backend uses hardware ray tracing when available and otherwise selects the portable OpenGL tracer. It starts with 10 paths per frame and at most 10 bounces; --backend=portable selects the OpenGL tracer explicitly.

Screenshot

Target and run

CMake target: rayrai_nested_glass.

./build-examples/examples/rayrai_nested_glass

On Windows, run rayrai_nested_glass.exe. Drag to look, use WASD and Space to move, and click an object to orbit it. The Geometry refraction panel controls the backend, samples per frame, and bounce count. The example needs no TCP viewer.

For a finite PNG capture or a stacked-media stress scene:

./build-examples/examples/rayrai_nested_glass --backend=portable --out=nested_glass.png --frames=24 --warmup=0
./build-examples/examples/rayrai_nested_glass --layers=4

--layers=N supports 1 through 16 concentric glass/water boxes; --layers=0 returns to the default composition. --benchmark runs a finite timing pass, and --width, --height, --bounces, and --msaa control its render.