Hi @Gévarred
Well if you really want this kind of customization maybe you can use a 2d capture scene.
You need to create one of these 2d scene capture and a target render.
Than a material and feed the Target render into the material, Change the material domain from surface to userInterface.
Then make a widget , add an image and set the brush-image to the material you done.
This way you can set the Camera wherever you want in the widget space,
If you (like me) can see the target-render in the widget project but when you hit play it became white, play with the tint, i dont know why .