I did RTRT (real-time ray tracing) with dynamic LBVH rebuilding for each frame 
(online webgpu demo)
you can drag&drop obj files to canvas (set shadow depth to zero if too dark)
P.S.:
Vega7 (5600G iGPU)
LBVH build time :
[264 tris] scene 1 (animation) 2.9 ms
[156 tris] scene 2 (simple) 2.2-2.7 ms
[218,724 tris] scene 3 (chess) 12.5 ms
How are you ? check my LBVH ray tracer (post above),
demo allows (by setting a checkbox) to rebuild LBVH for each frame
P.S.:
those who have powerful video cards, I wonder how scene #3 will work for you with the rebuild LBVH checkbox set and the camera close to the figures? (full screen window)
Briefly the results (full screen, checkbox set, and place the board approximately as in the screenshot):
1080p, fullscreen, Vega 7 (5600G iGPU), 7 FPS,
1440p, fullscreen, RTX3080 10Гб, 55 FPS (GPU load is approximately 83-85%),
Edge, 4K, fullscreen, RTX 4090, 68 fps
@erichlof @carolhmj @Happy0Ending @jelster @Bumpy check it out !!
Amazing! 
I get incredible 100 FPS at 3456x2234 on MacBook Pro M4 MAX (chess scene)!!
Gosh this is impressive mate!!!
