Loading...
> >

Iray: distance from world center affects material transparency and the camera light?

argel1200argel1200 Posts: 760
in The Commons

This is a wierd one. If I render near the world center everything looks great. But if I move the character to e.g. X: -7500, Y: 2500, Z: 2000 then I suddenly have solid strips for the eyebrows and see other areas where transparency shows through. I also had a scene with a bunch of citry streets in it and it looked like there was a blindingly bright light on the character, though lighting on the buildings was just fine. Is this a "how Iray works" issue or am I running into a bug? Is there a safe "sphere/half sphere" we have to remain in to avoid issues? Is there some kind if texture optimization going on based on disatnce from the world center (seems odd, wouldn't distance from the camera make more sense)?

Comments

  • TheKDTheKD Posts: 2,711

    Yep, I think you found a bug. At least I hope it's a bug. Moved her to your exact coords.

     

    messy.jpg
    700 x 700 - 162K
  • TheKDTheKD Posts: 2,711

    As an afterthought, I changed environment map from infinite dome, to sun and sky to make sure that wasn't messing it up and got the same results.

  • evilded777evilded777 Posts: 2,487

    Pretty sure this is somewhat known. I remember reading about something similar, but I do not recall the exact details. I do not believe it is "intended" and is categorized as a bug.

    You may want to file a ticket and see what they say... 

  • argel1200argel1200 Posts: 760
    edited January 2016

    I contacted technical support (is the bug database no longer online?) so we will see what they come back with.

    Post edited by argel1200 on
  • TabascoJackTabascoJack Posts: 865

    Here's a thread talking about it:

    http://www.daz3d.com/forums/discussion/63424/funky-eyelash-shadows-with-iray-aka-don-t-stray-from-world-center

    Apparently it's been submitted as a bug.  I hoped it was fixed in 4.9.

     

  • argel1200argel1200 Posts: 760
    edited January 2016

    Thanks for the link! Based on that thread, distance 500 is the limit. I may have to do some composites to work around it. Thanks again for the link!

    Post edited by argel1200 on
  • fastbike1fastbike1 Posts: 4,081

    Looks like it is fixed. I've attached a 4.9.0.63 render at the OP's coords. HDRI lighting only.

    away from center.jpg
    750 x 1125 - 44K
  • argel1200argel1200 Posts: 760

    Where was the camera/light pointing? Apprently, it can make a difference.

  • glaseyeglaseye Posts: 1,312

    Not fixed in the 4.9.0.63 beta; though for me the distance limit (in x and z) is around a 1000 (cm)

     

  • TheKDTheKD Posts: 2,711
    edited January 2016

    My method was just move her to coordinates by typing them into the transform parameters, hit that button to make the camera go there and render. Didn't add no extra light, I can't rightly remember if I switched the headlamp on the camera off. I usually to remember to do that though.

    Oh yeah, I am running version 4.9063 64 bit if that makes any difference to nailing down the issue.

    Post edited by TheKD on
  • argel1200argel1200 Posts: 760
    TheKD said:

    My method was just move her to coordinates by typing them into the transform parameters, hit that button to make the camera go there and render. Didn't add no extra light, I can't rightly remember if I switched the headlamp on the camera off. I usually to remember to do that though.

    Oh yeah, I am running version 4.9063 64 bit if that makes any difference to nailing down the issue.

    I defintly left the headlamp on, so maybe that is the difference.

  • eric suscheric susch Posts: 135

    If your light is HDRI only you won't see the problem.  It only happens with soft scene lights (not sure about the headlamp.)

Sign In or Register to comment.