SketchUp[1] is built for ease of use for in mind for people who are not 3D pros but there&#x27;s actually quite a lot of clever things going on under the hood[2] so it would not be a weekend project to reimplement. But yes, a web based clone would be awesome.<p>[1] It&#x27;s now owned&#x2F;developed by Trimble, Google sold it to them ~4 years ago<p>[2] <a href="http:&#x2F;&#x2F;mastersketchup.com&#x2F;sketchup-inference&#x2F;" rel="nofollow">http:&#x2F;&#x2F;mastersketchup.com&#x2F;sketchup-inference&#x2F;</a>