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Elevation Drape of Aerial

Tom Felcone
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Hello,

I'm trying to get a decent resolution aerial image exported to LumenRT

 I'm trying to attach a material using elevation drape. I've attached the material, and can even see it if I dynamically adjust it, but once I'm done adjusting, I just get a gray square. For what it's worth -The aerial does not show up in the preview window of the material editor. Are there any material settings that would obscure an elevation draped material?

Thanks 

Tom F

Oh - I did try Descartes, image looked good but was completely scrambled on export to lumenRT (see earlier post), as well as dcdrape.pal which cut really down the resolution, but did export to LumenRT.

  • 0 Offline
    Hi Tom,

    I wonder if you might be running into memory problems? I remember this happening with large rasters on my lower spec laptop but working correctly on my workstation.
    Have you tried different raster formats? I typically use PNG. It could also be something to do with the raster cache file (CTIFF), possibly not being created. There are no particular material setting that would influence its appearance as far as I know.
    I hope someone from Bentley picks up on this for you, as I can see your problem is Microstation related and not LumenRT as originally thought.

    Max
  • 0 Offline in reply to Max Voigt
    Max,
    I posted a longer reply on the LumenRT forum, I did get the elevation drape to work in MicroStation. It's a little washed out, but that's probably a lighting issue. The LumenRT export gave me a speckled white surface. Have you ever seen any tutorials on how to drape an image in LumenRT? LumenRT looks really promising and I'm trying to make this work, but I'm running our of things to try.
    Tom F.
  • 0 Offline in reply to Tom Felcone
    Hi Tom - yes, that sounds like a lighting issue; try switching on Photographic Tone Mapping in the Brightness tab of your Light Manager. Also, Auto Gamma Correct. I typically use Solar only (no Ambient, Flashbulb or Sky Dome for large exterior scenes). For the material settings, reduce Specular to 0. Diffuse is usually 60-80, depending on the light setup.
    On the LumenRT side, I'm out of ideas - will add a quick note on that forum too. I've never draped an image in LumenRT - always prefer to drive everything from the cad side for flexibility as the project changes. I'm looking forward to tighter integration between the two (currently planting two sets of trees for instance - one to render properly in Microstation, the other in LumenRT. Not very practical.)

    Max
  • 0 Offline in reply to Max Voigt
    It looks like the material has a ton of specular. Can you try reducing the specular intensity in the LumenRT material editor for the aerial material. The whole DC Drape thing is being re-examined. It does work, but the resolution of the exported drape material is greatly reduced from the source image which is why they often come out looking pixeltated. Max's workaroind for this is the right approach for now.
  • 0 Offline in reply to David Burdick

    David,

    Thanks for the tip - I'll check the specular settings. I was able to get a decent (not as good as the Deescartes drape) looking image drape into LumenRT using Max's elevation drape method. Glad to hear your lookinig into the resolution issue.

    Tom F

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