This is a Unity project demonstrating how to draw additive light volumes with outlines where they intersect other geometry and each other.

• The light volumes are additive, so no sorting or depth challenges
• Each volume is a primitive with an analytical signed distance field representation used by other volumes to draw intersection boundaries
• The scene depth buffer is used to approximate intersection boundaries with other solid geometry
• Backface culling is disabled, and the shader compensates for the viewpoint being inside a volume by rendering its far side twice as brightly
• Depth testing is disabled, and the parts of the volume mesh that are behind solid geometry are either draw on top of the geometry or discarded
• If the light volumes are going to be mostly static, one might save a tiny bit of perf by adjusting SDFVolumeManagerComponent to only update its GPU volume buffer when changes have occurred, rather than every frame

1. Create a GameObject and add an SDFVolumeManagerComponent.
2. Add instances of the volume prefabs in Prefabs/ as children of the manager you created, and transform them however you please.
3. Alternatively, you can create volumes without their respective GameObjects from script by using the SDFVolumeManagerComponent.Add...(...) methods.