Aerial Imagery in LumenRT

Question

I am working on a LumenRT model for a medium sized civil project. I have exported my existing surface to a Descartes Scalable Terrain Model and successfully draped an aerial image on it. However, when I export to LumenRT I get weird results. 
 If I simply export to LumenRT (normal model) the aerial image on the surface looks terrific, but the civil elements look terrible. Alternatively, when I export to a "large" LumenRT model, I get civil elements that look great, but the aerial image does not come in. 
 What can i do to make the aerial image look as good in the "large" LumenRT model as it does in the regular LumenRT model? 
 I am using LumenRT Version 16.01.30.66 and Microstation SS4 Version 08.11.09.832 
 Thanks, 
 -Ben 
 
 Attachments: 
 Regular-1.jpg: "Regular" LumenRT Model 
 Regular-2.jpg: "Regular" LumenRT Model 
 Large-1.jpg: "Large" LumenRT Model

Mara Manconi · Answer

Hi Benjamin, 
 
The full resolution aerial images are not taken across from LumenRT. Here is what happens depending on the type of terrain used: 
 
1. If using a MicroStation Terrain Model, the aerial maps are composited into a 1K x 1K image (V8i) or 4K x 4K image (Microstation Connect Edition) 
2. If using a Descartes STM (this is your case), the images are broken up into 512 x 512 or 1024 x 1024 tiles depending on the resolution of the terrain – moving closer to the terrain with the camera will generate larger image tiles. 
3. If using a RealityMesh for the terrain, these are tiled at 512 x 512 
 
I hope this explains 
 
regards 
Mara