Instructables
In this instructables I will show you how to make a 3D door sign with a realistic mountain panorama as background.
The mountain panorama is created from real world elevation data.
The door sign is then created using a CNC mill
 
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Step 1: Tools and materials


You need:
If your CNC milling machine is not strong enough (as mine):
  • some sort of dense foam
  • some mold making material (I used natural rubber)
  • some pouring mass (I used the ceramics-like pouring mass "ARTIDEE Artestone" )

Step 2: Creating the 3D-Model

To create a model for milling I decided to create a hightmap of the panorama view.

In a first step I created a 3D-Model of the elevation data of the mountains I had, so I can work with it in blender.
I used elevation the data from http://www.viewfinderpanoramas.org/dem3.html

First open the hgt file with 3dem, then file->save Terragen file.
Open the resulting terragen file TerraConv (might take some time), then export and save.
voila, you've a heightmap:-)
(There might be a simpler, more direct way, but I didn't find any tools for that.)

Now the height map can be imported into blender, by following the steps in this tutorial:
http://en.wikibooks.org/wiki/Blender_3D:_Noob_to_Pro/Making_Landscapes_with_heightmaps

Now choose a view for your panorama, the screenshot in the images shows the panorama I chose (that's basically the panorama you see, from where I live +800 height meters).

I exported the view as another heightmap (from which one can easily create gcode for the cnc mill) by following this tutorial:

http://wiki.blender.org/index.php/Doc:2.4/Tutorials/Textures/Maps/Creating_a_Heightmap_from_a_Plane
(basically it's a shader less rendering, where only the z-axis is used as input)

The result is the last image you see above. It's a height map of the panorama

I've been looking into greyscale image to 3d topography type software as well, it seems like the software you are using might be doing some smoothing on the final stl file? do you think that's right?
derwassi (author)  amandaghassaei1 year ago
Hi, To be honest i've done this project nearly 10 month ago.. so i don't remember everything in exact detail. But I didn't create stl files at all. I went directly from greyscale to gcode.
But i think i might have smoothed (gaussian blur) the greyscale prior to generating the 3d model in Blender from it.
I've only little knowledge of blender, but it might have done some resampling (and therefore smoothing) during the generation of the model Form the greyscale.
In the final image i did some brightness corrections so hat the flowers where not too much elevated and the text was really on top of everything