I'm playing with the HDRP Lit shader, but I find that I cannot get a perfect clear reflection image on a totally smooth plane. Even though I set the smoothness to 1, metallic to 1, the reflected image is not that clear(I thought it can be as clear as background). Screenshot is below: I set up a simple project with only an hdri sky and a little plank. Make the smoothness and metallic to 1. The reflected image on the surface is quite similar to a oil painting(full of tiny color chunks and the lines are jagged) while I thought it would be as clear as a mirror. You could focus on the fence edges, floor brick edges and the leaves in the screenshot above. Is there any other settings I should tweak? Or it's normal that I cannot get a perfect mirror-like reflection on a totally smooth surface. What I have considered: Compression. I set compression of the hdri file to "none" Post-processing. I only add four overrides: "Visual Environment", "HDRI Sky", "Fog", "Tonemapping". Adding "Fog" is to make sure that fog is disabled. So there is no post-processing blurring my final frame. Thanks for any suggestions and discussion.