"Darkness" light

[qillerneu]

Is it possible to create a light that modulates existing diffuse or environment lighting? I.e. a spotlight that projects darkness instead of a light. For example, even projection textures seem to be additive.

[Censor]

Something like this?

Darken texture with spotlight

I’m trying to add a simple shadow effect (a simple gray-ish circle) under some moving sprites to give them some depth in the scene. Is it possible to achieve this using a spotlight somehow, so getting the opposite effect out of one? Here’s a playground example: https://playground.babylonjs.com/#20OAV9#3620 So instead of making things lighter around the sprite, I’d like the spotlight to make things darker, like a shadow. Since I only need a simple shadow effect, I thought something like this …

[qillerneu]

Awesome, thanks! I’ve tried negative intensity but it didn’t seem to have worked with PBR materials. Buried deep in the another thread linked from that was the hack that worked nicely:

Babylon Projection Texture Support

For PBR materials, it’s surfaceAlbedo that should be updated, not baseColor: