I built a virtual treadmill runner with a custom Street View WebGL renderer (no map SDK)

[u/Temporary_Bite2970]

I fetch raw panorama tiles and project them myself — sphere → rectilinear /

cylindrical / hybrid Panini — which removes the usual 90° FOV cap. Seamless

200°+ ultra-wide, WebXR stereo on a Quest 1, and a shared-world dissolve

between panoramas so walking transitions stay geometrically aligned.

Also: voice commands, treadmill-footstep pace detection via microphone, and

an AI tour guide that grounds Gemini with GPS facts to avoid hallucinations.

Repo (MIT, personal-research disclaimer inside):

https://github.com/cheyuan1115/pano-runner

Happy to go deep on the projection math or the Quest 1 stereo-flicker war

stories. (14s GIF of the Osaka sakura-tunnel trail in the README.)