So I made this rubik's cube just to try it out. Feel free to use it for any use necessary. Recommended to append into your own scene.
ps: I do not own the HDR. That is by Maxime Roz, but I have to include it because it's in the thumbnail.
You pack 275 MB environment image to a 3 MB blend file. Cool cool.
Also, are you sure it's worth uploading another rubik's cube? (Rubick's Cube, Magic Cubes, Rubik's Cube 3x3, Rubix Cube, Rubics Cube).
I was just trying it out.
Why is it 58 MB big?
Because it includes all the resources.