URP-PSX VS URP_BlitRenderFeature

There is a great repo of URP shaders for the psx look on github

I don't know if I'm too stupid to understand what a shader is but whatever. I've heard you have to apply as a material to objects. However when I have a shader like this one https://github.com/Kodrin/URP-PSX. Would there be any way to just have it on the whole game? Like a filter basically. I'm new

Okay this is a shader in Unity which replicates the vertex jitter from the PS1. I'm finding it tricky to get the lighting and coloring right, so it will take a lot of experimentation. Link to the shader is here: https://github.com/Kodrin/URP-PSX

It's a PSX shader I found. There's actually three that I know of (1, 2, 3), but I only used the first because it seemed simplest to get running. I'll probably mess with the others down the line, too.

I searched the web and found the following shader. It's a Unity Shader and I'm not exactly sure what it does intuitively, but maybe this is a good start?

After experimenting (a lot) i tried inserting the shader in this universal blit by cyanilux (https://github.com/Cyanilux/URP_BlitRenderFeature) hoping i would be able to reverse engineer it. But i still couldn't get it to work, i think i am not correctly mapping the effect to whats happening on screen. I'd appreciate any help on this. Just getting the unmodified effect working with cyanilux' blit would be awesome, i'm sure i could handle and dissect it then!

Custom Render Feature -> Executes Blit (from this github) using the shadergraph material as input

So I want to make fullscreen effects in my game (for example, a potion might make the screen get covered up partially in crystal effects) and I found this render feature by Cyalinux https://github.com/Cyanilux/URP_BlitRenderFeature. It works well, creating screen effects using a material, but it also seems to affect the reflection probes. When i have a render feature material, realtime reflection probes (I have them baking on awake because my game has procedural environments) stop working. Prebaked ones are fine, but realtime ones don't have any effects. I believe this is because the render feature is affecting the reflection probes camera, but I'm not fully sure. Is there a way to fix this or will I have to stick with using UI for screen effects.

The OnRenderImage & blit approach was really common with the built-in pipeline. The most conceptually similar replacement in URP is to write a renderfeature to handle the blit. If you don't feel like writing the render feature there is this one: https://github.com/Cyanilux/URP_BlitRenderFeature I've only used my own, but I've seen this one referenced multiple times.

Use Universal render pipeline, add this file to your project Blit.cs

Once done with that, I use this Blit render feature for URP CLICK ME

How did you implement the full screen shader? Are using custom post processing + URP's 2D Renderer? I'm currently trying to get custom post processing working with URP's 2D Renderer Data with absolutely no luck. URP's Forward Renderer Data works with this Blit Renderer Feature, but using the URP Forward Renderer Data means not having any 2D lighting. I'm using URP's 2D lighting and so have a hard requirement on using the URP 2D Renderer Data.