TLDR

Anyway if anyone downloads this project make sure to go into edge_detection_compositor.gd script and add 

Line 123  rd.free_rid(texture_sampler)

to make the project not crash and also double check to enable "needs normal roughness" box within the inspector 

the worldenvironment  
-> Compositor  
-> Array[CompositorEffect]  
-> EdgeDectionCompositor  
-> [✓] Needs Normal Roughness

Hi, firstly thanks for this example project. It has been helping me find the visual style for my game.

However I think I've run into a similar bug to Kog_Works. I enabled "needs normal roughness" box within the worldenvironment -> compositor -> so on. 

For a while the project runs great, but after some time all of a sudden I end up getting this error that spams the console and makes the engine unusable since it makes everything lag.

 ERROR: Uniforms were never supplied for set (0) at the time of drawing, which are required by the pipeline.
 ERROR: ./core/templates/rid_owner.h:294 - Parameter "mem" is null.
 ERROR: SamplerTexture (binding: 2) should provide two IDs referencing a sampler and then a texture (IDs provided: 1).
 ERROR: servers/rendering/renderer_rd/uniform_set_cache_rd.h:120 - Condition "rid.is_null()" is true. Returning: rid
 ERROR: servers/rendering/rendering_device.cpp:5221 - Parameter "uniform_set" is null.
 ERROR: Uniforms were never supplied for set (0) at the time of drawing, which are required by the pipeline.
 ERROR: Element limit reached.

I haven't learnt compositing effects from scratch yet but any help or directions is appreciated. 👍

edit: I'm using Godot 4.5 and after running a fresh version of the project for almost 10 minutes got the same error as above.

edit - 2: I tried a fresh version of the project in a fresh install of Godot 4.4 like in ur video and got a slightly different error from myself previously and Kog_works. This time it happened after running the scene for 14 minutes and 50 seconds.

ERROR: Element limit reached.   
ERROR: ./core/templates/rid_owner.h:296 - Parameter "mem" is null.   
ERROR: servers/rendering/renderer_rd/uniform_set_cache_rd.h:131 - Condition "rid.is_null()" is true. Returning: rid   
ERROR: servers/rendering/rendering_device.cpp:5153 - Parameter "uniform_set" is null.   
ERROR: Uniforms were never supplied for set (0) at the time of drawing, which are required by the pipeline.
ERROR: Element limit reached.   
ERROR: ./core/templates/rid_owner.h:296 - Parameter "mem" is null.   
ERROR: Failed to create uniform set for batch.

edit - 3: I think I found the problem, before I got too many errors and the whole engine becomes unusable, I went to the debugger and clicked on the first error which took me to the edge_detection_compositor.gd script, line 78. The error causing this issue has something to do with 

texture_sampler = rd.sampler_create(texture_sampler) 

having its element limit reached. When using 

sampler_create() 

The documentation says to make sure to use 

free_rid()

Once ur finished using your RID.

I think var texture_sampler was constantly getting larger and eventually caused a memory leak, making the outline disappear from the game and making the engine super slow and unresponsive.

I did fix the issue by putting 

rd.free_rid(texture_sampler)

on line 123 of edge_detection_compositor.gd and then was able to see memory usage in task manager wasn't slowly climbing anymore when running the project. I also ran the project for an hour afterwards and it was completely fine, memory usage actually went down to around ~200MB, probably something to do with godot in the background doing stuff with shader optimisation.

I also notice that line 120 in edge_detection_compositor.gd was commented out, is there a reason for that?

Muito legal cara! Parabéns!

This looks incredible. I'm downloading it and 5*-ing it right away, in good faith. 

I am betting this technique could be used to make some sprite sheets, too!