Commented on yesterday's Ask HN: What are you working on? (August 2026), thought I might as well submit a Show HN.

If you see climbing world cup/championship, there is this 3D modelling thing [1]. I want that for my weekly bouldering.

I scanned my local climbing gym into 3D mesh using iphone. Built a simple editor to trim, merge, move/rotate meshes. You can interact with the mesh, view routes, view climb, etc. So this is unlike many gaussian splatting projects where the main use is for viewing. I built a pipeline in updating climbing walls. Climbing routes are manually annotated. Climbing videos are registered against the 3D mesh. Based on one input video, body positions resolved into 3D/4D space. you can view the body landmarks from different angle.

COLMAP, OpenMVS, fastapi, svelte, database is just local json files. A read only build is exported so I can host on github page

If you climb, or know someone who climbs, would love to hear your feedback. Do you usually record your climbs? If I make this a service, what will make you use it?

[1] https://www.youtube.com/shorts/8zdUOaCr6DY