Do you know if it’s possible to get X Y Z location of a pixel from a picture that is placed on a mesh? I am trying to create a custom reflections that will be in fact more simple than line tracing, however if my ground material is rocks (2D mesh with a 3D picture on it - top camera) and blood is spilled on the floor I will make the color of the brightests spots to become near white (as a reflection from the fresh juicy blood), and I also want if an object is moving nearby to cast additional dark color over the white to simulate realistic reflections (shadows on the new white color). The issue is I will need coordinates from each white spot (in other words every new rock that becomes white) to compare its position to the object, with this I can make the shadowy reflection appears more right - center - more left on the “new white spots”
Even if it’s a plane with your picture on, an object moving over it will cause shadowing. Am I missing something?
While this may not sound helpful… it is.
Postprocess materials.
Start with a fog of war tutorial and think about how you could use the location of the rocks, rather than camera location and altering scene output not by light, but color.
… and if you don’t know how to use them yet, a minute or two learning about material parameter collections (lets you pass where that rock is to the material in world space).
Using postprocess volumes is too complex to explain in a response here, but it is the information I think you’re looking for.