Previewer.tscn

[gd_scene load_steps=5 format=2]

[ext_resource path="res://Previewer-GDScript.gd" type="Script" id=1]

[sub_resource type="QuadMesh" id=1]
size = Vector2( 2, 2 )

[sub_resource type="Shader" id=2]
code = "shader_type spatial;
render_mode unshaded;

void vertex() {
	// Cover the screen
	POSITION = vec4(VERTEX, 1.0);
}

void fragment() {
	vec3 pgBufferSample = texture(SCREEN_TEXTURE, SCREEN_UV, 0).rgb;
	
	// Same as the regular version
	vec3 litColor = mix(vec3(0.7), vec3(1., 0.2, 0.2), pgBufferSample.r);
	vec3 shadowColor = mix(vec3(0.1), vec3(0.8, 0., 0.), pgBufferSample.r);
	float lightCoef = step(0.3, pgBufferSample.g);
	vec3 finalColor = mix(shadowColor, litColor, lightCoef);
	
	// We use ALBEDO instead of COLOR
	ALBEDO = finalColor;
}
"

[sub_resource type="ShaderMaterial" id=3]
shader = SubResource( 2 )

[node name="Previewer" type="MeshInstance"]
mesh = SubResource( 1 )
material/0 = SubResource( 3 )
script = ExtResource( 1 )