Yes. The pack is royalty-free: use it in as many personal and commercial projects (games, films, renders) as you like. You just can't resell or share the model and texture files themselves.

No. The .blend uses procedural glowing materials that work straight away. The PNG textures are for game engines (Unity, Unreal, Godot) and other 3D apps.

For games, use the Atlas version: all 12 mushrooms share one 4K material, so it's cheaper to render. Use the Single version if you want higher detail per mushroom or want to re-texture just one of them.

Yes. The FBX files are exported with Unity axis settings, and the pack includes a Unity MetallicSmoothness map and an Unreal ORM map. Setup steps are in the Documentation tab and the README.

The torn rings and gill flaps on a few mushrooms use alpha for their ragged edges. Use the BaseColorAlpha texture with Alpha Clipping (Unity) or a Masked material (Unreal).