TL;DR of the post, generated automatically.

Using the free Quixel Megascans from Fab in Defold, via converted glTF files.

• Setup: get the converted glTF or GLB, then set the model's Scene.
• Materials: Defold auto-fills them with built-in PBR shaders. Lights work too.
• Version: Defold 1.14.1 doesn't need defold-pbr, unless you use image based lighting.