Are the elements in the background at an angle?
As it is Area reinforcement is it fully with the U- Shaped elements? Did you get warnings reinforcing was outside its host?
It looks like the View is showing elements in the background.
From the Properties Palette, Change the View Depth to a lesser value to reduce the far clip offset and the Clip Range also
Jay Colcombe
Autodesk Certified Instructor
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B.Sc. Hons Civil & Structural Engineering
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