Problems with Plan Regions in 8.1

[brendan.mac]

I have a floor plan that requires sub-regions to show details below the standard cutting plane height. However, I have found that after I insert the sub-region and revisit the drawing at a later stage, the floor plan has become 'transparent', as if I have switched the view to wire frame.
This means that if I have a modelled any footings or thickenings to the slab, they become visible through the slab.
Has anyone else come across this problem?
If so, are there settings I should be making to remove this viewing error?

[luigi]

I have a floor plan that requires sub-regions to show details below the standard cutting plane height. However, I have found that after I insert the sub-region and revisit the drawing at a later stage, the floor plan has become 'transparent', as if I have switched the view to wire frame.
This means that if I have a modelled any footings or thickenings to the slab, they become visible through the slab.
Has anyone else come across this problem?
If so, are there settings I should be making to remove this viewing error?I may have missed the actual situation, but it sounds like your plan regions are set to a view depth low enough to see the footings. Check the properties of both your main plan and the plan regions, and make sure that the "view depth" and the "bottom" primary range are not low enough to the level of your footings...or better yet, make them the associated level with a offset of "0"

Let me know if I am guessing your situation or if I am off...

Take care,

[brendan.mac]

Already thought of that. View depth is set to the associated level with zero offset. Cutting plane is set to 1650 (eye height) and bottom of the primary range is set to the associated level with zero offset.
However, to make the story really interesting, I have found that if I set the primary range of the top cutting plan to the associated level and then specifiy above the eye height to say 1800, the slab returns to 'solid' and I do not see the footings modelled below.
Correct me if I'm wrong, but the top the top cutting plane has nothing to do with the view depth, does it? I interpret 'depth' being anything BELOW the set cutting plane at 1650 AFL.
This doesn't solve the problems I have with the plan regions but at least I know how to correct this when I find I have to delete any plan regions I have previously tried to use...