Actually added ui3d shader

res/shaders/ui3d.glslf

@@ -0,0 +1,9 @@
+in vec2 a_textureCoord;
+in vec4 a_color;
+out vec4 f_color;
+
+uniform sampler2D u_texture;
+
+void main(){
+	f_color = a_color * texture(u_texture, a_textureCoord);
+}