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Bug Lit Layered doesn't handle semi transparency?

Discussion in 'High Definition Render Pipeline' started by GawebStudio, Aug 21, 2022.

  1. GawebStudio

    GawebStudio

    Joined:
    Aug 14, 2017
    Posts:
    11
    Hi,
    I'm trying to use the HDRP/Lit Layered to merge textures together.

    Here is my first case, merging two gradient to transparent together:
    h.png and v.png
    And here is my set up and result, Material set as transparent:
    upload_2022-8-21_10-45-25.png

    You can see a visible fully transparent vertical line which shouldn't be there.

    Second case: Material is set to opaque this time with red color as main layer

    upload_2022-8-21_10-44-50.png

    The layer 1 semi transparency is completely ignored.

    Did I miss an option somewhere so that merging is smooth?

    Best regards
     

    Attached Files:

    • h.png
      h.png
      File size:
      186 KB
      Views:
      60
    • v.png
      v.png
      File size:
      142.4 KB
      Views:
      60
    GawebStudio, Aug 21, 2022
    #1

  2. GawebStudio

    GawebStudio

    Joined:
    Aug 14, 2017
    Posts:
    11
    Bump. No one knows about this issue? It seems pretty flagrant to me.
     
    GawebStudio, Aug 22, 2022
    #2

  3. GawebStudio

    GawebStudio

    Joined:
    Aug 14, 2017
    Posts:
    11
    OK so after a reply on Discord, layered textures are ignoring alpha channel so we need to use the layer mask which RGB channels are masks for layer 1, 2 and 3 while the alpha is the mask for the main layer. It was a bit confusing but it makes sense now. Also, since masks are packed together, tiling and offset are linked on each layers.
     
    GawebStudio, Aug 23, 2022
    #3