I am working on a project where i need to use a phong material for normal map effects. The patch will be used as a background. The problem is, that the phong material does not work with the fullscreen rectangle op. I am ok with using a normal rect, but the problem is now, that it is never really fullscreen, and the background of the patch bleeds through, depending on what height the canvas is, which is really bad in terms of responsive design.
Here is a simplified patch that illustrates the problem: https://cables.gl/ui/#/project/8gy1ky
So i am asking for a workaround, where I can use a phong material on a rect, but still be able to fill the whole canvas with it. Can anybody help me out? Is there a solution, which wont result in some stretching/distortion of the textures? even with stretching, how would i keep the rect always the same height and width as the canvas?