I created a new project in UE4 (ver 4.10.4) with “no starter content” and “scalable to 2D/3D” settings. Essentially, there are a total of 5 assets in the project 1) floor, 2) light source, 3) sky sphere, 4) atmospheric fog and 5) player start.
When packaged to HTML5 with “shipping” build configuration, the size of the package is around **155 MB. ** The HTML project was launched from within the editor (Launch -> Nightly(64 bit). The 155 MB HTML5 directory that gets created is under the /Binaries folder.
If I create a similar project in Three.js, the file size (including three.js library file) is just ~ 200 kB. (However, I did not include a sky sphere - just a basic rectangular floor mesh with a light source).
Any references/pointers will be appreciated. TIA