Dependencies

• Pin your three.js version. Its API deprecates things continuously — known examples:
  • the RoomEnvironment constructor dropped its renderer argument around r150;
  • r180 deprecated RGBELoader in favour of HDRLoader (the old class still loads, but warns);
  • r185 deprecated PCFSoftShadowMap, which now silently falls back to PCFShadowMap;
  • colour-space and tone-mapping defaults have changed more than once.
• After a three.js upgrade you must check the browser console. No deprecation warnings in the console is an acceptance criterion.