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    Tree problem

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    • A Offline
      andre51
      last edited by

      Hi Jim

      Will this work? It works for me in Maxwell. Shadows in render ok...
      PineTree1.skp

      Andre

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      • J Offline
        jim_tim
        last edited by

        Ok so I upgraded to sketchup 8 (from 7) because I couldn't open Andre's file. This seemed to cure the white bits inbetween the branches whilst in the model. However, Even the tree model Andre sent me is rendering the white around the branches..... see below:

        http://i777.photobucket.com/albums/yy60/jim_tim/treesno.jpg

        What would you guys suggest I do to get around this problem. I'd really like to use Andre's tree or the first trees I was using in my Vray renders but I'm not sure how to lose the white bits.

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        • Alan FraserA Offline
          Alan Fraser
          last edited by

          The images (and shadow casters) in that tree are png files...and V-ray doesn't like png files. I believe that the very latest version can deal with png transparency, but any earlier version is going to produce exactly what you are seeing...with the transparent sections rendering as opaque white. You'll either need to upgrade, use the original png images to produce separate diffuse and transparency maps...or use something like Twilight.

          3D Figures
          Were you required to walk 500 miles? Were you advised to walk 500 more?
          You could be entitled to compensation. Call the Pro Claimers now!

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          • GaieusG Offline
            Gaieus
            last edited by

            @jim_tim said:

            Ok so I upgraded to sketchup 8 (from 7) because I couldn't open Andre's file. This seemed to cure the white bits inbetween the branches whilst in the model.

            That could have simple been caused by transparency settings under Styles in SU 7 (and a fresh, new install of SU 8 may have a different style applied - although if it's the same model, who knows)

            @jim_tim said:

            However, Even the tree model Andre sent me is rendering the white around the branches...

            @alan fraser said:

            The images (and shadow casters) in that tree are png files...and V-ray doesn't like png files. I believe that the very latest version can deal with png transparency, but any earlier version is going to produce exactly what you are seeing...with the transparent sections rendering as opaque white.

            @gaieus said:

            For Vray to render these trees well, you will probably add a clipmap (it can be easily generated from an image file that has transparent areas).

            Are you reading those suggestions?

            Gai...

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            • J Offline
              jim_tim
              last edited by

              I'd quite like to try this......."use the original png images to produce separate diffuse and transparency maps". Can anyone point me in the direction of a tutorial on how to do this or is it pretty straight forward?

              Thanks everyone for their suggestions and advice so far πŸ˜„

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              • Alan FraserA Offline
                Alan Fraser
                last edited by

                You'll need something like Photoshop, PSP, Photopaint or Gimp to get diffuse and transparency maps.
                For the diffuse, I'd suggest opening the original png, placing another layer behind it and flood-filling that in a similar green. Then flatten the image and save as a jpg.

                For the transparency map, you'll need to again open the png, the magic-wand select the transparent areas, then use that selection mask to produce an image that is pure white where you want opacity and pure black where you want transparency.

                In other words, you'll get an mage of the branches as a white silhouette on a black background.
                You may need to invert this in V-Ray. There is an invert check box on the clip map dialog.

                3D Figures
                Were you required to walk 500 miles? Were you advised to walk 500 more?
                You could be entitled to compensation. Call the Pro Claimers now!

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                • andybotA Offline
                  andybot
                  last edited by

                  in vray - there's an option in the material editor on the diffuse layer to "use color texture as transparency". Check that box and you should be good to go. Don't need to worry about alpha maps...

                  http://charlottesvillearchitecturalrendering.com/

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                  • Alan FraserA Offline
                    Alan Fraser
                    last edited by

                    I think that's only in the latest version, Andy. No such box on earlier ones.

                    3D Figures
                    Were you required to walk 500 miles? Were you advised to walk 500 more?
                    You could be entitled to compensation. Call the Pro Claimers now!

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                    • andybotA Offline
                      andybot
                      last edited by

                      @alan fraser said:

                      I think that's only in the latest version, Andy. No such box on earlier ones.

                      That's true. What version are you on jim_tim?

                      http://charlottesvillearchitecturalrendering.com/

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                      • J Offline
                        jim_tim
                        last edited by

                        Guys, I'm sorry I should've mentioned earlier that I'm using version 1.48.89. Andybot's suggestion worked πŸ˜„ Thank you all for your input. Problem solved thank you very much πŸ˜„

                        http://i777.photobucket.com/albums/yy60/jim_tim/treesgood.jpg

                        Don't know what I'd do without this forum lol.

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