[Jeremy]

Hi StijnM,

What's the file size?

Here's what you can do. Open a new station.
"Tools"->"Options"->"Display"->"Display text on screen" -> Enable "Render time"
You will see the FPS count bottom left of your screen. (This is just to see improvements)

Import the file with the fast-import settings.
Try to move the object/view and look at the frame count. (FPS)
Double-click the part.
"Object panel" to your right.
"More Option" -> "Change color"

The numbers on the colors represent the number of polygons that need rendering.
The hight the number, the bigger the wait.

Sometimes you will find one color (generally grey) that has more polygons than the rest.
This is often because surfaces were imported twice.
I recommend clicking the color and dropping the Alpha channel to 0.
You will see if this removes or reveals details.
If those surfaces were not needed you can go back to the "Change colors" window, right-click the color and "Delete mesh".
Get rid of any unnecessary color/polygons.

Close this window and see if it made a difference to the frame count (FPS).

If it's still heavy,
"Tools"->"Options"->"Display"
Enable "Don't display object smaller than" and try with a value below 1.5%.

If it's still heavy,
"Tools"->"Options"->"Display"
"Display performance" -> "Simplify Objects" -> "Select the object".

让我知道如果它帮助。

Jeremy