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Question Camera to RenderTexture alpha not working.

Discussion in 'Universal Render Pipeline' started by Ibaii, May 17, 2020.

  1. Ibaii

    Ibaii

    Joined:
    Mar 31, 2017
    Posts:
    2
    Hi, Im trying to make a shop ui with items (models) rotating. The problem is that the rendertexture alpha always is 1.

    No matters what color or alpha is in the camera enviroment or the render texture format.

    Also, camera stacking is not working for me, i want to put the objects in front of the UI

    Unity version: 2019.3.0f6
    URP version: 7.2.0

    upload_2020-5-17_13-57-30.png

    upload_2020-5-17_13-58-16.png
     
    Ibaii, May 17, 2020
    #1

  2. GoldenretriverYT

    GoldenretriverYT

    Joined:
    May 8, 2019
    Posts:
    13
    Same problem. I am trying to generate previews, but the background is always black and not transparent.
     
    GoldenretriverYT, Jan 16, 2022
    #2

  3. y-iwanaga

    y-iwanaga

    Joined:
    Jul 2, 2021
    Posts:
    21
    I have confirmed that it is possible with URP of Unity2020.3.23 and Unity2021.2.7.
    (1) Set the Render Texture of the Camera to a format with an alpha plane such as R16G16B16A16_FLOAT.
    (2) Turn off Post Processing of the Camera.
    (3) Alpha plane does not become 1.0.
    (4) Implement necessary post processing with Render Features.
    get_alpha_in_urp.png
     
    y-iwanaga, Jan 20, 2022
    #3