Tutorials completed.

ActionRPG-HeartBeast/WhiteColor_shader.tres

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+[gd_resource type="Shader" format=2]
+
+[resource]
+code = "shader_type canvas_item;
+
+uniform bool active = false;
+
+void fragment() {
+	vec4 previous_color = texture(TEXTURE, UV);
+	vec4 white_color = vec4(1.0,1.0,1.0,previous_color.a);
+	vec4 new_color = previous_color;
+	if (active == true) {
+		new_color = white_color;
+	}
+	COLOR = new_color;
+}"