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Cannot get 100% mirror-like reflection from HDRP Lit shader

Discussion in 'High Definition Render Pipeline' started by moranBoar, Oct 6, 2021.

  1. moranBoar

    moranBoar

    Joined:
    Dec 14, 2018
    Posts:
    5
    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:
    upload_2021-10-6_17-39-31.png

    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:
    1. Compression. I set compression of the hdri file to "none"
    2. 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. :)
     
  2. lilacsky824

    lilacsky824

    Joined:
    May 19, 2018
    Posts:
    123
    Seems you set lower resolution of sky reflection in HDRP asset.
    Try to use higher resolution and see it works? o_O
    未命名.jpg
     
  3. moranBoar

    moranBoar

    Joined:
    Dec 14, 2018
    Posts:
    5
    Thanks for your reply! I tried this setting, but it seems that "Reflection Size" cannot solve this problem.
     
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