How to write a PBR Unlit Shader in Unity? [closed]

Question

I have a REALLY specific case here:

I have an Texture (a webcam), that is used by a shader to pickup a few x,y colors at the cordinates, and renders to a Custom Render Texture, that is later fetched (download pixel color information from GPU to CPU), and I can handle the algorithm from there.

The thing is, once I upgraded the project to PBR (Physically Based Rendering), all my Unlit scripts become PINK, and they stopped working.

This is a special case because:

1. It doesn't need to appear on the screen
2. It acts as a "Compute Shader", but with backward compatibility to old phones
3. It works well without PBR, but once PBR is enabled it becomes pink and stops working
4. It doesn't need to reflect, refract, output pixels or anything to the "Screen", only to my Custom Render Texture so that I can fetch it later.
5. The algorithm doesn't fits on a Graph based programming (it has iterations and etc)

Well, I didn't find documentation on how to write custom PBR shaders and here I am.

Answer 1

I had the same problem. I think you need to create a Lightweight Render Pipeline Asset on my Assets folder (r-click -> create -> Lightweight Render Pipeline Asset) then dragged it to my Graphics settings (Edit -> Project Settings -> drag to Scriptable Render Pipelline settings). After that go to Edit -> Render Pipeline -> Upgrade Render Material to LightweightRP Material. Then you napply yout material. Hope this helps even it's not the same scenario.

Edit: adding note: To download Lightweight Render Pipeline you need to go to Window -> Package Manager and enable Previews under the Advance dropdown.