Projector - UV Texture from Camera Space

Hi, I’m trying to do spherical texture mapping using camera space, real-time.

Example effect to recreate:

I saw Point Light Cookies with cubemaps are available in Playcanvas (
but the end looking result is way too soft-blended:

Seems to me this would be a simple change on the shader-blending. I guess having access to these parameters would fix:


How to proceed? Is it possible to do what I’m looking for?
Any tips are much needed. Thank you.