Using an outline shader on a tileset?

[broken tide]

Hi,

I'm trying to use an outline shader to outline the shape of my entire tileset.

I've found this shader online: https://godotshaders.com/shader/2d-outline-inline/
But when using it on a tilemap, it outlines each individual tile, and doesn't do an outline at all if an individual tile has no transparent pixels.

I know this is because the UV property in the shader refers to each individual tile's UV when using a shader, but I have tried modifying this shader using SCREEN_UV to replace UV, and it hasn't worked.

I've done a ton of searches to try and fix this by myself, but I'm pretty new to shaders and I'm having trouble fixing it on my own.

Any help greatly appreciated!

[outer ridge]

if you are using godot 4, you could put it inside CanvasGroup and apply the shader to that, I am pretty sure that's it's intended use.

[broken tide]

3.5.1 sadly, but that’s good to know for the future!

[outer ridge]

then the setup is bit more complicated but you can use viewports

[broken tide]

Ah ok, I’m guessing I can child the tilemap to the viewport and apply the shader to the viewport with screen_uv coordinates or something?

[outer ridge]

just texture

it works like a sprite

[broken tide]

Ahhhh ok nice! I seee

[outer ridge]

well depends
how you render it

[broken tide]

Yeah

I’ll try messing with that later - thanks a lot 🫡🫡