Guess, you mean this one[0,1,2], right?

If so, I just:

1) modeled MOC in LeoCAD & saved it as `.ldr`;

2) imported `.ldr` into Blender 2.79 (you may use later version) using ImportLDraw addon[3] & just rendered it in "Cycles" render mode (in later versions of Blender its possible use "Eevee" render mode too);

3) final touches was made using AzPainter[4] image editor.

That's all! If you are interested in more LDraw tools and other digitallego resources check the "AWESOME LDraw" list.[5]

There is good guide on ImportLDraw usage for realistic rendering.[6,7]

[0] https://i.imgur.com/VBLIbUn.png

[1] https://twitter.com/app4soft/status/1174490820050849792/phot...

[2] https://www.reddit.com/r/lego/comments/d666xd/micropolis_mal...

[3] https://github.com/TobyLobster/ImportLDraw

[4] https://git.io/azpainter

[5] https://git.io/digitallego

[6] https://www.rm-media.net/photo-realistic-rendering-with-leoc...

[7] https://github.com/beranep/lego_black_knights_castle_6086

For this render I used 10+ y/o laptop w/ CPU P4 Dual-Core + integrated GPU Radeon Xpress 1250 (Blender was running in `software-gl` mode) — as a result this model rendered in few hours ( ^_^;)