Make invisible decal cast a shadow? - Building Support - Developer Forum

First Person Shadow Disappeared - Building Support - Developer Forum

Unreal Engine Material Properties

3D lights and shadows — Godot Engine (stable) documentation in English

Unity - Manual: Trail Renderer

Can you make an invisible part cast a shadow? - Building Support - Developer Forum

Setting Up Materials - Documentation - Unigine Developer

How to make a part invisible but can't see what's on the other side - Building Support - Developer Forum

Remove shadow under parts? - Building Support - Developer Forum

How to add shadows for small objects - Building Support - Developer Forum

Standard Material 3D and ORM Material 3D — Godot Engine (stable) documentation in English

Make invisible decal cast a shadow? - Building Support - Developer Forum