I tried to place a rectangle made of polarizer in front of my camera. In order to get the polarization Angle I wanted, I first rotated the rectangle around the z axis by 0°, 90°, 135° and 45°, and ...

The result of the rendered stokes vector is not as expected (there is a rectangle with "linearly polarized" material in front of the camera) I try to put a polarizer in front of the camera (polarizer ...