Draped Image on Terrain Model in LumenRT

Hello All

Some wisdom is required please - I am creating  large scale terrain model for export to LumenRT to do an animation.  I have created an STM in Descartes, exported it to a DTM and then draped a raster file over it as a dcdrape in Microstation Connect.  I find this gives me the best quality surface, but the drape is giving me trouble.  Firstly, the image does not always export.  randomly, the file will export with the image apparently not there.  I am not sure what is causing this - it is as though it is not finding the raster file.

I have managed to get around this by creating a custom material in a file where it does work and applying that in a file where it doesn't work.  My concern is that the location of the raster image may not be correct when I attach it this way.

Secondly, I am struggling with the resolution of the draped image itself.  I have read everything I can find on the forum regarding this, and tried all the lighting tricks and material settings, my result in Lumen is just not up to scratch. The material I am creating is pretty much default, type Special and DCDRAPE and I have turned the specular value right down.

The is the STM looks great in Descartes but fuzzy as soon as I get it into Microstation CE and fuzzier still in LumenRT.  Any suggestions as to how I might improve this would be much appreciated.

-W