> Usually the benchmark is "would a person reasonably confuse this for being the IP of another company"

That's not a standard anywhere in copyright law. You may be conflating it with parts of trademark law.

> https://www.luanti.org/media/gallery/5.jpg

That's a screenshot of a game made within Luanti (the voxel game engine being DMCA'd). The blog post shows all the textures included with Luanti itself (https://blog.luanti.org/static/blog/2026_dmca/builtin.webp).

Even then, it doesn't appear to show anything actually copied from Minecraft that would fall under copyright protection - the assets appear to be original.