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Controlling texture position in Dome light

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  • Controlling texture position in Dome light

    I have a collection of skies from VizPeople that have the lower half of the texture black as they are meant to project above the horizon. However, my ground plane is actually a large mesh to create an ocean surface, not an infinite plane because I'm using displacement. The mesh, although never would be large enough to reach the horizon line it extends enough to approximate the horizon. The problem is that I get a black gap between the ocean and the sky due to the sky texture being only the upper 50% of the image and not meant to go below the horizon.
    In the past I've been stretching the image below the horizon in Photoshop but I was hoping to lower it by using the mapping parameters in vray as I have 50 skies in the collection 20,000 px wide and it would be a big task.
    The only parameters that I'm able to achieve it is to use the rotate H and V parameters combined but this will need to be done for every camera angle because rotating vertically down, will result on a rotation up when I look in the opposite direction so I cannot use it either when animating the camera..
    Is there a way to drop the whole dome map vertically and be done ?

    Click image for larger version  Name:	horizon.jpg Views:	1 Size:	19.7 KB ID:	1007283
    Last edited by palosanto; 15-08-2018, 02:13 PM.
    www.marinevisuals.com
    3D Visualization for the Marine Industry

  • #2
    Try a slight increase (1.03-1.05) in the Vertical value of the slotted Bitmap texture (Texture Placement > Repeat U/V).

    Kind regards,
    Peter
    Peter Chaushev
    V-Ray for SketchUp | V-Ray for Rhino | Product Owner
    www.chaos.com

    Comment


    • #3
      Thanks Peter none of the values make any difference except the ones marked below.
      And even applying mirror V would leave the black horizon ...
      Can you duplicate this behavior ?

      Click image for larger version

Name:	bitmap parms.jpg
Views:	806
Size:	38.1 KB
ID:	1007406
      Last edited by palosanto; 16-08-2018, 11:28 AM.
      www.marinevisuals.com
      3D Visualization for the Marine Industry

      Comment


      • #4
        Make sure the Dome Light's Shape parameter set to Sphere.
        If this doesn't help could you please send over a sample packed project (just a rectangular plane, a Dome Light and your texture adjustments) so I can look into it?
        You can send it via a file-sharing service of your choice addressed at support@chaosgroup.com or in a forum private message to me.

        Kind regards,
        Peter
        Peter Chaushev
        V-Ray for SketchUp | V-Ray for Rhino | Product Owner
        www.chaos.com

        Comment


        • #5
          Originally posted by Peter.Chaushev View Post
          Make sure the Dome Light's Shape parameter set to Sphere.
          If this doesn't help could you please send over a sample packed project (just a rectangular plane, a Dome Light and your texture adjustments) so I can look into it?
          You can send it via a file-sharing service of your choice addressed at support@chaosgroup.com or in a forum private message to me.

          Kind regards,
          Peter
          Sending you a PM.
          www.marinevisuals.com
          3D Visualization for the Marine Industry

          Comment


          • #6
            Thank you for providing the scene! As already mentioned in PM this is definitely a bug (only works properly for adjustments made during Interactive Render). It affects solely bitmap textures slotted in Dome Light. As a workaround, please use the HDRI as Environment Background instead.

            Kind regards,
            Peter
            Peter Chaushev
            V-Ray for SketchUp | V-Ray for Rhino | Product Owner
            www.chaos.com

            Comment


            • #7
              Hey Guys
              Wondering if there was a solution found for this issue.
              Regards jahnyboy

              Comment


              • #8
                Originally posted by Jahnyboy View Post
                Hey Guys
                Wondering if there was a solution found for this issue.
                Regards jahnyboy
                Peter Chausnev already posted the workaround above.
                As a workaround, please use the HDRI as Environment Background instead
                The bug has been filed and it will be fixed on the next release. You need to wait.
                www.marinevisuals.com
                3D Visualization for the Marine Industry

                Comment

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