Which Blender versions? 4.2 LTS and newer; tested on 4.2.23, 4.5.14 and 5.2.1 with identical vertex, face and triangle counts (191 cases each).

Does it work in EEVEE? Standard shader nodes only, but only Cycles was checked.

Do I need Altbau Facade? No. It uses the same conventions (metres, wall plane at Y = 0, relief towards −Y), so pieces are placed on a facade by position; no Boolean is needed.

How do I close a wall corner? Two cornice runs: Mitre Out on both corner ends, the second run rotated 90° around Z (gallery image 4 and README).

Can I use my own materials? Yes: plaster, ornament and accent are material inputs.

Is it game-ready? No; apply the modifier and decimate if needed. Triangle counts are in the README (a 2 m crown cornice without ornaments is a few hundred triangles, rosettes and ornament rows are the heavy parts).

Can I use it commercially? Yes, in any number of projects. You may not resell or redistribute the asset itself. Personal = one person, Studio = one company up to 10 people.