Search Unity

  1. Unity Asset Manager is now available in public beta. Try it out now and join the conversation here in the forums.
    Dismiss Notice

Is lightmapping done on CPU or GPU?

Discussion in 'Unity 5 Pre-order Beta' started by GfK, Jan 31, 2015.

  1. GfK

    GfK

    Joined:
    Aug 15, 2014
    Posts:
    107
    I have a 4GB GTX970 graphics card.

    I also have a quadcore Intel i5-2400 CPU (socket 1155 - it's quite old now) @ 3.1GHz.

    Which is lightmapping calculated on? I've noticed (even in Unity 4.6) that lightmapping is unbearably slow, so would a high-end i7 help the situation? This'd obviously mean a new motherboard too as socket 1155 is virtually obsolete.
     
    GfK, Jan 31, 2015
    #1

  2. Tapgames

    Tapgames

    Joined:
    Dec 1, 2009
    Posts:
    242
    It's done on the cpu. So a faster cpu will results in quicker lightmap baking. Don't expect miracles.
    But if unity will support Enlighten Cuda baking it will be crazy fast.
     
    Tapgames, Jan 31, 2015
    #2

  3. AustinRichards

    AustinRichards

    Joined:
    Apr 4, 2013
    Posts:
    321
    That's something they should look into....
     
    AustinRichards, Jan 31, 2015
    #3

  4. hippocoder

    hippocoder

    Digital Ape

    Joined:
    Apr 11, 2010
    Posts:
    29,723
    That is the plan, looking into it after launch. 5.0 is about things working :)
     
    hippocoder, Jan 31, 2015
    #4

  5. AustinRichards

    AustinRichards

    Joined:
    Apr 4, 2013
    Posts:
    321
    Awesome!!!! Can't wait.
     
    AustinRichards, Jan 31, 2015
    #5

  6. DFT-Games

    DFT-Games

    Joined:
    Jun 24, 2010
    Posts:
    454
    If this is true then Unity 5 can't be used for quite a long time because current baking takes an average of 4 days on a i7 with 64GB RAM... if Unity doesn't fix this as a topmost priority we move the current project to UE4.

    Edit: The same scene setup on UE4 is fully baked in less than 1 hour :(
     
    DFT-Games, Jan 31, 2015
    #6

  7. hippocoder

    hippocoder

    Digital Ape

    Joined:
    Apr 11, 2010
    Posts:
    29,723
    Well short of reporting that scene as a bug, I don't see what can help. Have you tried clearing cache? Do you use terrain? If terrain, you need to set a lightmap properties to it which is set to very low.
     
    hippocoder, Jan 31, 2015
    #7

  8. AustinRichards

    AustinRichards

    Joined:
    Apr 4, 2013
    Posts:
    321
    That definitely is way longer than it should be. How large of a scene is this?
     
    AustinRichards, Jan 31, 2015
    #8

  9. shkar-noori

    shkar-noori

    Joined:
    Jun 10, 2013
    Posts:
    833
    still waiting for GPU calculation cause even on the i7 it takes ages to do baking...
     
    shkar-noori, Jan 31, 2015
    #9

  10. Joachim_Ante

    Joachim_Ante

    Unity Technologies

    Joined:
    Mar 16, 2005
    Posts:
    5,203
    We have some issues that have been fixed in the clustering stage that is causing this. They are much improved in b22.

    Final gather currently still has some crashbug issues that we are working on and will get into a build as soon as we fixed it.
     
    Joachim_Ante, Feb 1, 2015
    #10

  11. kite3h

    kite3h

    Joined:
    Aug 27, 2012
    Posts:
    197
    My scene also be down during indirect calculation . Is this Final Gather Problem?
     
    kite3h, Feb 2, 2015
    #11