EXCLUDE SECTION

ArchiCAD Sun: Excludes the ArchiCAD default sun from the import.
You should keep this option checked, since the default sun simply is a spotlight placed very far away. This results is a huge scene dimension, and confuses/slows down the renderer.
Better use a directional light to simulate the sun.

Default Camera: Excludes the default camera (ArchiCAD 3d-Window position) from import.

Fog: Excludes the strange ArchiCAD environment fog from import.

Background Colors: Excludes ArchiCAD's 3d-window sky and ground color environment settings. Also excludes the ambient light color.


CLEAN UP SECTION

Weld Overlapping Vertices: This option cleans up the geometry. Always leave this on. There is no knows disadvantage, as long as you keep the Threshold reasonable. Keep the threshold under the smallest used dimension in your scene. a value of 0.5mm is save. if you use 5mm, small details, like window glass, might be affected.
Please check your system units, or better switch to user units before tweaking the threshold.


SELECTION SET SECTION

Create Selection Set: This option creates a named selection set of the imported objects. This way you can easily delete all ArchiCAD objects later, to re-import a modified scene.


OPTIONS SECTION

Object Names Prefix: Gives all objects of the current import step a prefix. This is useful if you import in multiple steps, to avoid the 'object name already in use' pop-up window.

Zoom Extents: Zooms all viewports to extents after import.

Launch Material Replacer after Import: With material replacer you can quickly change or merge the poor ArchiCAD materials into 3ds max materials. Automation presets are supported.