OpenRoads Concept Station - Image disappearing when adding content

Question

I'm using ConceptStation V10.00.12.41 to develop some concepts for an interchange. As I'm adding content (mainline, ramps, ramp connections, etc...) I seem to be losing my aerial imagery. It seems to happen when adding ramp connections. It also doesn't seem to effect it if I'm zoomed in close...but if I'm trying to view the whole interchange the image starts to disappear. Has anyone else seen this behavior...any fixes? 
 Zoomed out:

Zoomed in: 
 
 Thanks, 
 Jamie

Simon Normand · Answer

When I've seen problems like these with Update 12, it was because one road's grading was overlapping with another road's grading. So 2 distinct clipping shapes were intersecting and the terrain would not display correctly. 
 With update 12, the fix was to use the Resolve Grading tool, it cleans up all grading overlaps between roads. 
 Update 13 of Conceptstation does not have these problems, you may want to update to the newer version.