I have a hololens app made in unity using the URP. I added a second camera of render type base and set the output texture to a custom render texture. I set the camera background type as uninitialized. I created a material and set the render texture as the surface input base map. I then created a plane, dragged the material onto it, and positioned it in the field of view of the main camera. I added a cube in the field of view of the second camera. I followed this link to do this...