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I was trying to create train tracks using NURBS path and everything looks to be great till I press play.

As soon as I play it in Blender Game Engine, the objects are no longer merged and have a clear separation (making it unrealistic).

I believe the problem is that one of the object moves till it reaches the other ones edges, but what I want is that they should not realign themselves.

Here is the blend file.

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  • $\begingroup$ Recalculate your normals View 3D > Edit Mode > Toolbar > Shading/UVs > Recalculate Normals $\endgroup$
    – BlendingJake
    Commented Nov 12, 2014 at 16:32
  • $\begingroup$ Tried Merge and recalculated the norms and nothing works $\endgroup$
    – chettyharish
    Commented Nov 12, 2014 at 18:14
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    $\begingroup$ Double check and visually make sure your normals are right View 3D > Edit Mode > Select All Faces > N-Panel > Mesh Display > Face Normals $\endgroup$
    – BlendingJake
    Commented Nov 12, 2014 at 20:13

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It finally worked! I was trying to recalculate normals of the base but I was not recalculating for the tracks which were being duplicated. So the steps are the same for all objects and related objects to the curve

View 3D > Edit Mode > Toolbar > Shading/UVs > Recalculate Normals

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