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Question How to use Position (Depth)

Discussion in 'Visual Effect Graph' started by skoteskote, Mar 28, 2021.

  1. skoteskote

    skoteskote

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    Hi, I am trying to recreate this awesome example by Vlad, basically rendering everything with particles. I can't seem to get the Position (Depth) node to work, whatever I do particles are instantiated on a flat plane in front of the camera. I'm probably missing something basic?

    Screenshot 2021-03-29 at 00.18.09.png
     
    skoteskote, Mar 28, 2021
    #1

  2. VladVNeykov

    VladVNeykov

    Unity Technologies

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    Hi @skoteskote ,

    Are you using HDRP or URP?
    VFX Camera buffer access for URP is still being worked on (part of this task on our roadmap)
     
    VladVNeykov, Mar 29, 2021
    #2
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  3. skoteskote

    skoteskote

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    Thanks for the quick response @VladVNeykov, I am on HDRP, but now I tried it on my PC and there all works as expected. My laptop (mbp) still renders the particles on a flat plane... But that's prob due to it being an old laptop, and it's not a problem for me as it's not my main workstation. All good!
     
    skoteskote, Mar 29, 2021
    #3

  4. VladVNeykov

    VladVNeykov

    Unity Technologies

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    We had an issue with the camera buffers on OSX, you might be in an earlier version where it still reproduced.
    Glad it works on your PC! :)
     
    VladVNeykov, Mar 29, 2021
    #4

  5. skoteskote

    skoteskote

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    Yes, that is it! I am on 2020.3 on my laptop

    Now I just need to figure out how to not render the objects I'm using for the depth buffer... But that's another story :)
     
    skoteskote, Mar 29, 2021
    #5

  6. andybak

    andybak

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    @VladVNeykov any chance of uploading the project from that tweet? or at least the .vfx file?
     
    andybak, Mar 31, 2021
    #6

  7. VladVNeykov

    VladVNeykov

    Unity Technologies

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    Hey @andybak , sure thing, I've updated it to vanilla 2020.3 / 10.4 (as the original was using some custom stuff) and cleaned it up a bit. It is set up for HDRP as URP doesn't have camera buffer access at the moment (that's planned for 2021.2). You can grab it here.
     

    Attached Files:

    Last edited: Apr 1, 2021
    VladVNeykov, Apr 1, 2021
    #7
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  8. andybak

    andybak

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    That's brilliant. Thanks!

    Mind if I put it up on Github so it's easier for other people to find (with proper credit of course)?
     
    andybak, Apr 3, 2021
    #8
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  9. VladVNeykov

    VladVNeykov

    Unity Technologies

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    Sure thing! Only bit I'm not 100% sure about is the mixamo dance animation (I put a *.txt in the package saying it came from there and from what I could tell from their FAQ it should be ok, but... mentioning it just in case ¯\_(ツ)_/¯ )
     
    VladVNeykov, Apr 3, 2021
    #9
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  10. andybak

    andybak

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    Maybe I'll swap it out for an animation from the CMU mocap library.

    Thanks!
     
    andybak, Apr 4, 2021
    #10
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  11. lucas_martinic

    lucas_martinic

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    Hi Vlad, was this implemented in URP?
     
    lucas_martinic, Mar 7, 2024
    #11

  12. OrsonFavrel

    OrsonFavrel

    Unity Technologies

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    Hello.
    Access to URP Camera Depth and Color Buffers landed in 2023.3.0a16 and above.
    Have a lovely day.
     
    OrsonFavrel, Mar 7, 2024
    #12