Original Summary

I built this one myself. No signup, no payment, it all runs in the browser. You place ramps, walls, pegs, spinners, boxes and balls on a lit 3D wall, press play, and a real rigid body simulation runs. Export a 9:16 MP4 with sound when a run feels right. Two details that mattered more than I expected. The export is a real MP4 encode, not a screen recording, because a screen recording of 3D looks flat and the audio never lines up with the impacts. And the whole thing runs client side, so there is no account and nothing to upload. No AI is used anywhere in it. Desktop only by design, phones get a short message rather than a broken scene. Would like to hear what breaks for people who build things like this. Wrong ball physics, impossible levels, missing export settings, all of it. https://www.marblerun.online   submitted by   /u/AmbarAnand04 [link]   [comments]

  • 情报分类：技术学习与提效
  • 分类依据：内容涉及技术、AI、软件工具或工程实践
  • 信息来源：Reddit · SideProject
  • 发布时间：2026/9/30 15:42:44