How To Fix Overlapping Object in 3dsMax Viewport

Fixing the display of imported FBX / 3DS models

Often when you import 3ds or fbx model of the building into 3ds Max, it looks distorted in the viewport. It usually happens when the model was exported from the ArchiCAD, Revit or other BIM applications. Although these glitches don’t affect the quality of rendering, they can be annoying while working on the model.

Fortunately, it’s really easy to fix this issue – all you need is to activate 3ds Max’s viewport clipping and when clipping controls (yellow triangles) appears on the right side of the viewport, push the lower triangle slightly up until the model starts to look correctly

Source: https://www.kotiger.co/blog/3ds-max-viewport-clipping