I am trying to make a 3d model from real map data using Blender. I have iso/contour-lines (curves) in which I can trace and convert to vector format which I then can import into Blender. Does anyone have any idea how to trick these curves into a 3d model in Blender? Just like you can with SketchUp (Sandbox–>From Contours tool - see http://www.youtube.com/watch?v=AvtgwfBe84c )? I want to avoid making a raster heightmap, because then I would have to blur/interpolate in Photoshop making things unaccurate.
You could try BSurfaces addon which is included in Blender.
Put the curves to one object (select objects, ctrl+J), select it, shift select the mesh, edit mode, click add surface on the tool shelf.
I made a quick example by drawing grease pencil lines, converted them to curves, edited them a bit and did what I described.
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You don’t select the grease pencil lines but convert them to curves which you can select and edit if you like. Convert is in grease pencil options on the properties panel (N).
Aune, I do not believe there is an easy way to do this in Blender, but then again I also do not believe there is one tool that can do everything (even though duct tape comes pretty close) I say if you can achieve this in Sketchup then why look for another solution? I will also say that using the sandbox tool in SU is the old and sometimes very ugly way, there is a better solution designed for exactly what you need. http://sketchucation.com/forums/viewtopic.php?f=323&t=52039
Toposhaper will get the job done perfectly and after if you need to work in Blender all you do is export as obj, import into Blender press alt+J and remove doubles.
Thanks Pstoppel! I will check this out. I’ve also been trying out GRASS GIS, (google “contour lines to DEM”) with some success. It seems to be able to interpolate okay between isolines.
