[SOLVED] Polygon vertices order

Pipeline
1

I’m modeling, then I copy a building and extended x-axis scaling -1 units . When export to egg:

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I guess the vertices order is mistake.

edit:

Sorry ! It’s normal problem .

2

Probably a problem with the normals.
Try do recalculate it, or flip the wrong ones, or even disable backface culling (enable two sided) in Game Settings (the engine in Blender should be Blender Game).

3

This is definitely a problem with normals. When you scale something by -1 you’re turning it inside out. You need to recalculate the normals to get it the right way around again.

4

To check the normals orientation:
Open a properties panel In the “edit mode” (key N) then go to the “Mesh Display” and check the flag to display face normals.