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    White dotted lines---Shooo!

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    • B Offline
      barry gray
      last edited by

      I've put together a board and batt wall,textured all faces with an "old wood" jpeg.

      When rotated, with shadow on and edges off,
      a vertical/dotted white lines appear on the rear edge of the batts. They change as I rotate and disappear in the shadow area and when viewed straight on. They show after export to Photoshop in jpeg, png and tiff. Anti-alias on or off makes no diff.

      What are they and how do I get rid of them?

      I tried texture on both sides of the face but all that does is change the line color.

      Attached jpeg should show what I mean.

      Thanks for any help,
      Barry


      AspenLumberTexted2.5.jpg

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      • R Offline
        remus
        last edited by

        Might i ask how youve modelled the wall?

        sometimes when you have 3 or more faces sharing an edge the edge seems to bleed through.

        http://remusrendering.wordpress.com/

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        • T Offline
          tomsdesk
          last edited by

          Yeah, try painting the backside with a darker color...or even the material itself?

          http://www.tomsdesk.moonfruit.com/
          2.5D Trees & Shrubs!

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          • B Offline
            barry gray
            last edited by

            Hi remus,

            The wall is 6" thick textured with jpeg. The batts are 1x4s, textured with the same peg, saved as a component and glued to the face of the wall. The lines appear on the rear corner of the front face of the batt. Only two faces joining there. They are also more apparent the further away they are.

            Hope that helps.

            Thanks

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            • B Offline
              barry gray
              last edited by

              tomsdesk,

              Tried all that (colors and the peg), all it does is change the color of the lines. They are still quite obvious.

              Oh well, Thanks anyway

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              • Chris FullmerC Offline
                Chris Fullmer
                last edited by

                That should be fixable. Maybe upload the model?

                Chris

                Lately you've been tan, suspicious for the winter.
                All my Plugins I've written

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                • boofredlayB Offline
                  boofredlay
                  last edited by

                  Barry, change your default back face color dark and see if that helps.

                  Nice texture by the way.

                  Backface.jpg

                  Edit: I found a topic that discussed this a couple years ago as well.
                  Hope this helps.
                  http://www.sketchucation.com/forums/scf/viewtopic.php?p=5447#p5447

                  http://www.coroflot.com/boofredlay

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                  • B Offline
                    barry gray
                    last edited by

                    Thanks everyone,
                    I settled for coloring the reverse face. After a lot of experiment I got something that's at least very subtle. Still wish I knew what caused it.

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                    • GaieusG Offline
                      Gaieus
                      last edited by

                      Antialiasing (or actually the lack of it) causes it. With these vector lines - that are supposed to be perfectly straight even shown diagonally - the problem is that the pixels on your monitor run in a vertical/horizontal network. Now when these diagonal lines displayed (and there's not enough antialiasing on), the line becomes jagged (like steps) and the back face bleeds through in between these steps.

                      To make the "painting of back faces" simpler, after texturing your front faces (individully, as you need), group the whole thing and apply the same texture on the group as a whole. It will texture everything (including back faces) whose faces are not textured in the previous step (those will be kept intact).

                      If your video card supports OpenGL (and Antialiasing) nicely, you can set it in Window (Sketchup on Mac) > Preferences > OpenGL > Harware acceleration; if you have it checked and select that option, in a list you will see antialiasing options like x2, x4 etc. The higher you set it, the smoother your lines will be (and the less the back faces will bleed through) although the higher it is set, the slower the performance of your SU can be.

                      If it doesn't really bother you during modeling, you can keep it low. During export, you can set antialiasing separately if you wish and it won't be so striking in an exported image.

                      Gai...

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