thomasdebos Posted May 28, 2012 Share Posted May 28, 2012 Hey everyone! Ive been trying to render a scene in Sketchup 8.0 using Vray (version 1.5 I think) that has a large water surface. Besides slowing down the render time significantly because of the reflections, I also get all sorts of weird lines and dark areas in the surface (check the attached image to see what I mean). The water surface is a single surface that is grouped. I tried creating a basic rectangle that cuts through the model at the same height, but I got weird spots near the edges where it meets the 'solid' model. Anyone ever had the same problem? Ive tried searching the net but couldnt find this issue yet. Any help will be much appreciated! http://www.debosdesign.nl/wp-content/uploads/093.jpg Link to comment Share on other sites More sharing options...
Stephen Thomas Posted May 28, 2012 Share Posted May 28, 2012 Looks like the problem is in your geometry. I suspect if you subdivide your water surface into smaller polygons this should go away. Link to comment Share on other sites More sharing options...
thomasdebos Posted May 28, 2012 Author Share Posted May 28, 2012 Thanks for the advice, Stephen. The extra subdivisions in the surface did speed up the rendering, but unfortunately did not get rid of the weird lines... However, they are always in the same place so you would think it has something to do with the geometry. Link to comment Share on other sites More sharing options...
Stephen Thomas Posted May 28, 2012 Share Posted May 28, 2012 It is definitely to do with how the mesh is triangulated. Try remaking the geometry. You could even just use a rectangular plane if all the land geometry is higher than the water surface, no need to cut it to fit the shape. Link to comment Share on other sites More sharing options...
thomasdebos Posted May 28, 2012 Author Share Posted May 28, 2012 Okay Ive created a new rectangular surface and divided it into many small ones. This seems to be working quite well. Most of the lines are gone, but one area is still showing up lighter than the areas around it :s I will keep trying to make it perfect. Thanks a lot for thinking along! Link to comment Share on other sites More sharing options...
Tommy L Posted May 28, 2012 Share Posted May 28, 2012 Co-planar geometry for sure. I'd follow the above advice to delete all your water and throw a plane in there. No need to subdivide it into smaller pieces, one big one will do fine. Link to comment Share on other sites More sharing options...
thomasdebos Posted May 29, 2012 Author Share Posted May 29, 2012 It worked! Im not sure what I did wrong the last time, but a new big rectangle did the trick. Render times weren't even that bad either. (still strange considering the 'other' surface was also a single continuous plane...) Thanks for the help! Link to comment Share on other sites More sharing options...
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