• Bugs
• Model cut in 3D

Issue

In the 3D OpenGL perspective view the model is cut by an invisible plane. Fit in window appears to shrink the model to a small dot. The bug does not occur while viewing the model in the axonometric mode or with the Internal 3D engine.

Cause

An ArchiCAD element's body includes a far-off point, which makes the model's bounding box very large. This far off point could be the result of an incorrect mitering of walls or a bogus setting of an element, e.g. unusually large light cone for a lamp, extreme stair height.

Solution

• Go to perspective OpenGL 3D window

• Hit Fit In window - the model will “disappear” – it will move very far away from you

• Select all the window area with the arrow tool – you will probably see 2 or more distant selection dots
• If you select these points separately, you will probably see that one represents many elements, while the other marks only a single element (this is a bogus data element -- most likely a wall)
• Delete this element
• Save and close the file to clear the bad data from the memory
• Reopen the file
• 3D is now probably fixed (if not repeat above steps)
• Redraw the element(s) you deleted

Graphisoft is currently investigating this issue.

The problem exists even if there is only one element around 80-100 meters long or high. This can be only one building, and you cannot delete the half of it. In this case the only solution is to use the built-in engine with hidden lines in 3d, because this is nearly as fast as with opengl.