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Iray not rendering object instances in Canvas mode

mwasielewski1990mwasielewski1990 Posts: 343
in Technical Help (nuts n bolts)

So.. another question from me.

Is there a reason why Iray is not rendering object instances in Canvas-Beauty mode? I select desired objects, select "create node with selection", but all selected object instances render black. Everything else renders fine.

Is there a workaround to this?

Comments

  • margravemargrave Posts: 1,822

    Is the original object the instances are based off a part of your node list?

  • mwasielewski1990mwasielewski1990 Posts: 343
    margrave said:

    Is the original object the instances are based off a part of your node list?

    I don't understand the question :)

    I have a group of stuff parented together and then instanced. It renders all instances during normal render, but not in canvas mode.

  • algovincianalgovincian Posts: 2,614

    I don't think this is a new issue. Please let me know if you ever find out any information (I never did):

    https://www.daz3d.com/forums/discussion/364806/iray-alpha-canvases-and-instances

    - Greg

  • skinklizzardskinklizzard Posts: 218

    so it looks like its an all or nothing with the canvases, if the original node that the instances are a copy of is in the node list all of it's instances will render in the canvas.

    instances on their own don't create a valid node list

  • algovincianalgovincian Posts: 2,614
    edited September 2020

    skinklizzard said:

    so it looks like its an all or nothing with the canvases, if the original node that the instances are a copy of is in the node list all of it's instances will render in the canvas.

    instances on their own don't create a valid node list

    Not exactly.

    I created a simple scene with a sphere and an instance of that sphere behind it. This is what I found:

    1. If no nodes are selected, the alpha channel renders both spheres:

    2. If just the instance is selected, this error message is displayed:

    3. If just the original is selected, or both the original and instance are selected, the alpha channel renders the original sphere but only the shadow of the instance (no error message):

    Ideally, it would be best if you could render a mask for just an instance. And obviously it should mask the object completely and not just the shadow.

    - Greg

    none-Canvas2-Alpha.png
    512 x 512 - 112K
    sphere-Canvas2-Alpha.png
    512 x 512 - 118K
    error.png
    516 x 107 - 162K
    Post edited by algovincian on
  • GordigGordig Posts: 10,062

    There's always Instances to Objects, assuming you're not trying to do something like an UltraScenery set that has thousands upon thousands of instances. 

  • lilweeplilweep Posts: 2,489

    how annoying

    for posterity, i tried changing Instancing Optimisation to Memory instead of Speed and that didnt help either.

  • lilweeplilweep Posts: 2,489
    edited November 2020
    algovincian said:
     

    I created a simple scene with a sphere and an instance of that sphere behind it. This is what I found:

    1. If no nodes are selected, the alpha channel renders both spheres:

     

    even if i select no nodes, it still doesnt render instances for me.

    Post edited by lilweep on
  • lilweeplilweep Posts: 2,489
    lilweep said:
    algovincian said:
     

    I created a simple scene with a sphere and an instance of that sphere behind it. This is what I found:

    1. If no nodes are selected, the alpha channel renders both spheres:

     

    even if i select no nodes, it still doesnt render instances for me.

    i deleted the offending beauty canvas and then re-created it, then with no nodes in the group it rendered everything visible, including instances - as per your example.  So weird.

  • DigitalSteamDigitalSteam Posts: 299
    edited April 2022

    Wait, so... Things like UltraScenery can't render using normal canvas passes for postwork?  How is that even a thing?  I just ran into this with a huge scene using Alpha Airdrome which does, of course, use instances (not to mention all the ones I created to build the scene) and now, on rendering, I'm finding I need to spend several hours making the scene even heavier to do canvas renders? (or buy the sript - or look into that 'convert figures' script...)

    Doesn't that seem like something that should ... be in the ... documen ... tation ...  ... Oh, yeah.  What documentation.  9_9

    I swear to dog, sometimes (thankfully, not very often) I have no idea where my loyalty to this software comes from. (Though I suspect the phrase "sunk cost fallacy" might enter into it...)  >_<

    Post edited by DigitalSteam on
  • capitanquesocapitanqueso Posts: 5

    DigitalSteam said:

    Wait, so... Things like UltraScenery can't render using normal canvas passes for postwork?  How is that even a thing?  I just ran into this with a huge scene using Alpha Airdrome which does, of course, use instances (not to mention all the ones I created to build the scene) and now, on rendering, I'm finding I need to spend several hours making the scene even heavier to do canvas renders? (or buy the sript - or look into that 'convert figures' script...)

    Doesn't that seem like something that should ... be in the ... documen ... tation ...  ... Oh, yeah.  What documentation.  9_9

    I swear to dog, sometimes (thankfully, not very often) I have no idea where my loyalty to this software comes from. (Though I suspect the phrase "sunk cost fallacy" might enter into it...)  >_<

    Well, to be fair, Instances is a Daz Studio feature while Canvas is an IRay feature, that said, here https://www.daz3d.com/forums/discussion/463661/canvases-hdr-and-instances is a post where someone succesfully rendered a couple of instances using a script that supposedly already comes with Daz, I havent tried it yet, cause I'm not sure I understood how it works, lol

    Let me know if anyone could make it work!

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