A toon shader for Unity's terrain tools that works with URP

⚠THIS SOLUTION IS BUGGY AND TESTED ONLY ON MY DEVICE ONLY IN THE UNITY EDITOR⚠

This is an adaptation of Probably Spoonie's Toon Terrain shader for URP.

When this inhevitably breaks down in the next Unity version, here's a basic explanation of how this works:

• ToonTerrain.shader: changed the includes and dependencies from URP's shaders to the new shaders we cloned.
  • (cloned from URP/Shaders/Terrain/TerrainLit.shader)
• ToonTerrainAdd.shader: this is where we define the new variables we need, like the wall texture, its size, tiling and sampler. also some more includes n stuff
  • (cloned from URP/Shaders/Terrain/TerrainLitAdd.shader)
• ToonTerrainInput.hlsl: the variables are defined here again, not sure why (:
  • (cloned from URP/Shaders/Terrain/TerrainLitInput.hlsl)
• ToonTerrainPasses.hlsl: contains the actual calculations. i used here the same triplanar mapping and cutoff algorithms shown in the original video.
  • (cloned from URP/Shaders/Terrain/TerrainLitPasses.hlsl)

You can always diff the files against their originals to see exactly what I changed