Image-space refraction

interfaces

TIR bounces

chromatic aberration

peel RT scale

stripe freq 100

swing max ±2.5

swing freq 5.0s

contrast 0.30

spin 1.26

cup lean 20°

camera tilt 80°

sun angle behind

sun 5.0

sharpness 500

absorption 0.70

— fps · — ms

— draw calls

drag the glass to turn it · shift-drag to move it
double-click to reset it · drag the sky for the sun
right-drag or scroll to orbit the camera
compare against baseline →

Baseline is the same cup drawn with three.js's stock MeshPhysicalMaterial transmission — no depth peel, no interface walk, no image-space refraction. It is the off-the-shelf result this renderer exists to beat, kept for A/B. Its environment is baked once at load, so it does not follow the sun or the wave, and three's transmission runs its own hidden scene capture, so its draw calls and frame time are not comparable.