# Export from VTK to LumionRT - with colors
**URL:** https://discourse.vtk.org/t/export-from-vtk-to-lumionrt-with-colors/1895
**Category:** Support
**Created:** [October 9, 2019, 12:34pm UTC](https://discourse.vtk.org/t/export-from-vtk-to-lumionrt-with-colors/1895 "2019-10-09T12:34:18Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@Mskovmand](https://discourse.vtk.org/u/Mskovmand)
#### Post date: [October 9, 2019, 12:34pm UTC](https://discourse.vtk.org/t/export-from-vtk-to-lumionrt-with-colors/1895/1 "2019-10-09T12:34:18Z")
I’m trying to assist a colleague in creating some “interface” between VTK generated models and LumionRT, where we seek to extract a colored poly data mesh to Lumion, so far without success.
I can easily extract this data as a .PLY file or a simple .vtk file and view it in Paraview. However, finding some format in which Lumion can actually read this proves troublesome.
I tried creating .OBJ and .MTL files, but I can’t get Lumion to get any information from the .MTL file (I also tried with Blender, again without success).
Lastly, I tried exporting a .VRML file, but in this case the only coloring I got was 1 color per actor, not useful.
Does anyone here have any experience with this? Any help would be highly appreciated.
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### Author:  [@lassoan](https://discourse.vtk.org/u/lassoan)
#### Post date: [October 9, 2019, 5:24pm UTC](https://discourse.vtk.org/t/export-from-vtk-to-lumionrt-with-colors/1895/2 "2019-10-09T17:24:11Z")
Have you tried [vtkOBJExporter](https://vtk.org/doc/nightly/html/classvtkOBJExporter.html)? It exports the renderer content as an obj+mtl file that Blender shows with correct colors.
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### Author:  [@Mskovmand](https://discourse.vtk.org/u/Mskovmand)
#### Post date: [October 9, 2019, 5:37pm UTC](https://discourse.vtk.org/t/export-from-vtk-to-lumionrt-with-colors/1895/3 "2019-10-09T17:37:20Z")
Thank you for your answer.
I did use the obj exporter. At first I could not this working with Blender, but I got it working eventually.
I’m visiting my colleague soon, so I can try hands on to assist in Lumion.
But I do believe that OBJ is the way to go right now.
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### Author:  [@Mskovmand](https://discourse.vtk.org/u/Mskovmand)
#### Post date: [October 10, 2019, 5:58am UTC](https://discourse.vtk.org/t/export-from-vtk-to-lumionrt-with-colors/1895/4 "2019-10-10T05:58:04Z")
I will try to explain the issue better, sadly didn’t have the time to do this thoroughly yesterday.
Even though I think the OBJ exporter works as intended, it appears to only provide me with the solid color set to the actor. In this case I have multiple actors colored this way, and one Glyph actor showing roughly 1000 Glyph spheres, all colored by point data using an `UnsignedCharArray` with RGB values. All these spheres are showing up white, as I’m not assigning the actor a color.
Is there a way to get these RGB values to the .mtl file?
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### Author:  [@lassoan](https://discourse.vtk.org/u/lassoan)
#### Post date: [October 10, 2019, 9:40pm UTC](https://discourse.vtk.org/t/export-from-vtk-to-lumionrt-with-colors/1895/5 "2019-10-10T21:40:12Z")
Tube current OBJ exporter only considers actor color. For more sophisticated coloring you may need to create a texture image and map colors from the surface to this image.
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### Author:  [@Mskovmand](https://discourse.vtk.org/u/Mskovmand)
#### Post date: [October 11, 2019, 5:15am UTC](https://discourse.vtk.org/t/export-from-vtk-to-lumionrt-with-colors/1895/6 "2019-10-11T05:15:27Z")
Alright, thanks for your time!
I will get on to create a texture image.