azizg Posted November 7, 2006 Share Posted November 7, 2006 Hi All I've just started making a site model for the first time since VW10. Wow what a fantastic improvment, good job. But I have a question about applying specific textures to specific areas. The land I'm working on is quite steep and is covered in large granite boulders (6 or 7 meters tall). These rocks are part of the landscape and there topography is included in my servey data. Now I need to texture them appropriately to distinguish them from the grass around them. Is there some way? I've tried using the "texture beds" in the "site modifiers" tool but this doesn't work at all. Is there some other way of applying specific textures to specific areas? Please help me. Quote Link to comment
azizg Posted November 8, 2006 Author Share Posted November 8, 2006 to any one that's interested, I've found a work around. by using pad's and fence's to cut out the rocks from the proposed DTM you can then get the existing DTM to show through. The problem is that you can't give the proposed and existing DTM's different textures, also you can't copy the DTM and give it a different texture. If the copy does not have the same texture as the original then it just disappears. So I've had to make a new DTM from the original data, this allows me to apply a different texture. The two DTM's can then be combined in a layer link. It seems to work. Quote Link to comment
CipesDesign Posted November 8, 2006 Share Posted November 8, 2006 You could also try the "drape surface" command. Use it on the whole model, then trim out around the rocks, group and/or class the draped rocks, apply a rock-like texture and voila! Quote Link to comment
azizg Posted November 8, 2006 Author Share Posted November 8, 2006 I've spent a lot of time over the last couple of days trying to find ways of texturing a DTM model, and there seems no easy way of doing it. We need a new modifier tool. However not a DTM modifier which is prone to problems, uses a lot of ram and can be complicated to use. We need a render works modifier to use with the DTM. If we could creat 2D (or 3D) polygons when in 2D plan projection which we could apply textures to, so that when in 3D those textures (not the polygons) are projected straight up onto the surface of the DTM. I don't know what the normal type of land is, but I'm working in the jungle and on hills in Thailand. Where I work we have big boulders, streams, natural foot paths that pass through the land and other features which are all included in the topographical data that I have. I don't need to alter the DTM to add these features, I just need to paint them on to the surface. from what I've read the "texture bed" "site modifier" does some thing similar, however it changes the DTM shape (which can cause problems and errors) and besides I couldn't get it to work in any of the situations I tried it in. Even in situations where the "site modifiers" are the best option, this method of painting on a texture can still be used as a quick way of working in the concept stage before commiting the time needed to do it properly after a decision has been made on direction. so how about it? A DTM renderworks "modifier"? I've added this to the wish list forum. If you think it's a good idea go and say so there. thanks Quote Link to comment
islandmon Posted November 8, 2006 Share Posted November 8, 2006 In DTM versions prior to v12 it is possible to just edit the 'Existing or Proposed DTM' symbols and to assign a texture map to the 3d Mesh. Quote Link to comment
CipesDesign Posted November 8, 2006 Share Posted November 8, 2006 EJ, yeah, that's right, but that's not what he's trying to do (read the original post). Azizg, did you try "drape surface"? It's in the MODEL>3d POWERPACK menu. I played around with it a bit last night and was quite impressed. I think it might work well for your boulders... Quote Link to comment
azizg Posted November 8, 2006 Author Share Posted November 8, 2006 I Cipes. No I haven't tried it yet, I'll give it a go in the morning. Island mon. You can apply a texture to a DTM but it wont tile as normal on any other object. It take the texture and seams to stretches a single instance over the hole model. quote help file: "if renderworks is installed, the site model can be textured from the render tab of the object info palette. The texture is applied to the surface of the site model, and is scaled to fit the site model bounding box." so unless you use a texture of several hundred square meters you don't get any detail up close. the "drape surface" sounds close to what I was suggesting, but it's still a 3D tool. This makes it difficult to edit the shape, it also makes it hard to get several different textures to interact closely, and edit them accurately. In 3D these things all take time. What I was suggesting is to use 2D polygons which then have the texture applied to them projected up to the DTM above. Working in 2D is fast and easy. You can do a quick presentation over several hundred square meters with paths, different flower beds, lawn, stream etc and it would only take 5 minutes. It if you wanted to edit it, it would also be really fast and easy. thanks for the tips guys, I'll try them and get back Quote Link to comment
islandmon Posted November 8, 2006 Share Posted November 8, 2006 The DTM symbols TIN mesh offers opportunities for texture placement . Nevertheless, there are instances where placement of individual 3d rock models and Image props of rocks , trees, benches, etc is also required. As for the 2d Hybrid , editing the symbol by adding the necessary patterned or image filled 2d polygons is very easy and efficient without any of the hassles of 3d textures applied to meshes and models. Quote Link to comment
Benson Shaw Posted December 16, 2006 Share Posted December 16, 2006 If you could identify the survey points for the boulders (or other feature) you could select and cut the boulder data out of the DTM dataset, paste it in place into another layer, create a new DTM from this data and give it its own texture. Two or more DTMs can exist and render on the same layer, or use a layer link. -B Quote Link to comment
azizg Posted December 16, 2006 Author Share Posted December 16, 2006 I ended up doing some thing similar to this. I created a modifier around the boulders on the proposed DTM to cut them out of the model and then had the existing DTM pushing through the gaps I'd made. Giving them both a different texture it worked quite well. Thanks for the ideas. Quote Link to comment
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