Auto Hybrid objects disappearing

[James Dawson Design]

I have created a model of a small courtyard that contains hardscapes and extrudes converted to Auto Hybrid objects.

 

When I view the model in Top view I see everything. When I toggle to Top Plan, some of the AutoHybrid objects disappear.

 

All the AH objects are essentially the same. Created as follows. 2D object -> Extrude -> AutoHybrid. With all 3 object types created on the same class for the object.

 

I have attached 2 screen captures to demonstrate. The missing items are some of a pergola structure that sits over a square deck area.

 

The highlighted objects on the perspective is what is missing.

[Tom W.]

Check the '2D Appearance' settings for the Auto Hybrids. What you see in Top/Plan depends on where the cut plane is (elevation), whether you have specified that you want the cut plane, below cut plane and/or above cut plane to display, and what the attributes are in each case.

[James Dawson Design]

 guess I will have to learn what cut planes are. You may well be correct.I

[Tom W.]

Another option is to turn the geometry into a hybrid symbol. This can be very quick using the 'Generate 2D from 3D Component' command.

[James Dawson Design]

OK, the cut plane elevation value was the issue.

 

All AH had a 1000 vale, however the disappearing AH objects had a Z value higher than that. i.e. 2400. I changed the cut plane elevation value to 3000 and they now dont disappear.

 

Time to learn a little more about this behaviour.