Scaled UV looks different in the editor than in the game

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1

Godot Version

4.3

Question

Hello I wrote this simple shader to make tiling some seamless textures nicer.

shader_type spatial;
uniform sampler2D tex;

// A shader for tiling (seemingly) without repetition.

#define MAX_TILES 100

// Scales the UV coordinates.
uniform float detail = 1.0;

// The number of tiles that will be rotate 
uniform int tile_count = 1;

// Angles for each tile that are used to rotate the UV coordiates inside the tile.
uniform float tile_angles[MAX_TILES];

uniform float roughness = 0.5;

mat2 rotate(float angle) {
	return mat2(
		vec2(cos(angle), sin(angle)),
		vec2(-sin(angle), cos(angle))
	);
}

void fragment() {
	vec2 uv = UV * detail;
	
	int side = int(ceil(sqrt(float(tile_count))));
	
	for (int i = 0; i < tile_count; i++) {
		for (int j = 0; j < tile_count; j++) {
			if (int(uv.x) % tile_count == i &&
				int (uv.y) % tile_count == j) {
				float angle = tile_angles[i * tile_count + j];
				ALBEDO = texture(tex, rotate(angle) * uv).rgb;
			}
		}
	}
	
	ROUGHNESS = roughness;
}

It looks as follows in the editor:

image
image1496×860 148 KB

However when I run the game it looks like this:

image
image1128×645 159 KB

I.e. the scaling of UV values is somehow different. Any idea what I am doing wrong?

2

It probably has to do something with the mesh I am using, this problem does not occur on a quad I create in the engine.

3

I changed the blend shape mode of my mesh and then back and now the problem does not occur :skull:. Hence this is clearly some sort of bug regarding UVs.