add option to world uv shader, scale checker grass

assets/shaders/horizontal_world_uv.gdshader

@@ -2,13 +2,14 @@ shader_type spatial;
 
 uniform sampler2D albedo_texture : repeat_enable, filter_nearest, source_color;
 uniform vec2 horizontal_uv_offset = vec2(0.0);
+uniform vec2 uv_scale = vec2(1.0);
 
 void vertex() {
 	vec3 world_position = (MODEL_MATRIX * vec4(VERTEX, 1.0)).xyz;
 	vec3 world_normal = (MODEL_NORMAL_MATRIX * NORMAL).xyz;
 	vec2 uv_y = world_position.xz + horizontal_uv_offset;
 	//vec3 normal_weights = world_normal / (world_normal.x + world_normal.y + world_normal.z);
-	UV = mix(UV, uv_y, abs(world_normal.y));
+	UV = mix(UV, uv_y * uv_scale, abs(world_normal.y));
 }
 
 void fragment() {

objects/sand_pit.tscn

@@ -8,6 +8,7 @@
 render_priority = 0
 shader = ExtResource("1_2mr0t")
 shader_parameter/horizontal_uv_offset = Vector2(0, 0)
+shader_parameter/uv_scale = Vector2(1, 1)
 shader_parameter/albedo_texture = ExtResource("1_yg8om")
 
 [node name="SandPit" type="CSGPolygon3D" node_paths=PackedStringArray("collision_polygon")]