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Weird Iray Clipping in Render

jim_doriajim_doria Posts: 128
in Daz Studio Discussion

Haven't come across this before, and not sure where to even start troubleshooting it. Set is the Old Manhattan Apartment. In the scene, the camera is looking down at a chracter standing on a platform that has a spiral staircase up to it. Characters down on the floor are looking up at the first character. I've attached an image 

It looks fine in the viewport, but when rendered, the top part of the scene is gone. The platform the character + costume disappear. The spiral staircase ceases to exist partway to the top,

I don't have any Iray clipping planes in the scene, at least not that I can find. The platform is too far from the camera to be inside the normal "too close" clipping boundary.

Looks fine in the viewport, but both preview and final renders shear off the top part of the scene.

Any ideas?

iray clipping.jpg
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Comments

  • dijituldijitul Posts: 146

    Shooting in the dark here, so to speak.

    Can you provide a screenshot of your camera settings?  Are you using a built-in DAZ camera or a third party camera?  Are all your objects near the 0,0,0 xyz coordinates?  

  • WendyLuvsCatzWendyLuvsCatz Posts: 38,493

    maybe the viewport is backface culling, I have seen this happen myself if the camera is embedded in something like the ceiling 

  • jim_doriajim_doria Posts: 128

    dijitul said:

    Shooting in the dark here, so to speak.

    Can you provide a screenshot of your camera settings?  Are you using a built-in DAZ camera or a third party camera?  Are all your objects near the 0,0,0 xyz coordinates?  

    I've attached the screenshot of the camera settings. I'm not entirely sure which kind of camera I used... Mostly I use built-in DAZ cameras but in this scene I might have played with the Iray Interior Camera I found on Deviant Art. Is there a way I could tell? I'm not actually clear on what 3rd party cameras are... I thought the interior camera was just a built-in camera with some iray section planes parented to it...

    WendyLuvsCatz said:

    maybe the viewport is backface culling, I have seen this happen myself if the camera is embedded in something like the ceiling 

     The camera is close to the ceiling... but would that cause the staircase to disappear in the middle the way it does? (I guess if it's working at the face level). But doesn't that work on the farthest objects first? Why would the walls and the figures, which are both farther away, be visible when things closer to the camera have been culled? Or am I misunderstanding how this works?

    Camera Settings.png
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  • jim_doriajim_doria Posts: 128
    edited December 2020

    The attachment to my original post which was an image showing the problem seems to have disappeared, at least in my browser... 

    It's here: https://www.daz3d.com/forums/uploads/FileUpload/22/a35720936a515048be09eadf1bd38c.jpg

    Post edited by jim_doria on
  • dijituldijitul Posts: 146
    edited December 2020

    Settings look normal, and they look familiar so I assume it's the DAZ camera, not a third party.  I've never tinkered with clip settings so I'm out of ideas here.  Have you tried deleting the camera and making a new one?  What about moving the camera closer (scrolling mouse wheel or right-click-drag on the pan icon)?  Maybe add another camera and start close up, then move it farther away to see where/if it changes?

     

    Post edited by dijitul on
  • Saxa -- SDSaxa -- SD Posts: 872
    edited December 2020

    jim_doria said:

     I might have played with the Iray Interior Camera I found on Deviant Art. Is there a way I could tell?

     

    When I saw the image i thought right away of these HDRI plane cameras like that one.  But you wrote you checked planes?

    To check, in scene click arrow next to Iray Interior Camera and expand.  Even if the camera is OFF, the planes in the hierarchy underneath are still on.  And they totally do what you are seeing.

    Post edited by Saxa -- SD on
  • jim_doriajim_doria Posts: 128
    edited December 2020

    OK, I moved the camera so no part of it was touching the ceiling. I looked through EVERY SINGLE ITEM in my scene tree to try and find clipping planes but there are none. Then I created a brand new camera with the default settings and pointed it at the problem. Things got even weirder. See attached.

    The top part of the attached image shows the camera at Y=255. The scene renders normally. The bottom part shows the camera at Y=260. Suddently all the geometry above a certain point just disappears and all you see is the HDRI background.

    It sure LOOKS like a clipping plane. Either that or the ground plane somehow in the wrong spot, but I checked the render settings, even turned ground plane off. And anyway, the problem seems to exist well above ground, somwhere between Y255 and Y260

    Anybody seen anything like this before?

    Weird Iray Issue Gets Weirder.jpg
    1487 x 1080 - 458K
    Post edited by jim_doria on
  • Saxa -- SDSaxa -- SD Posts: 872
     

    Anybody seen anything like this before?

    Yes. Everytime I forget to toggle of my planes included with the special HDRI camera, and am using another camera.  That's what it looks like. Or some version of crazy clipping like that.

    Otherwise, never.  So far.   (If it's something else and new, would love to know what it is.)

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