Symmetry object fails at Mapping and Bumps

[oguzbir]

Bug report.
Assume an object applied a symmetry modifier.

The bug is the texture of that symmetric object textures becomes flipped as well.
Here is the image that tells more about the problem.

Of course the texture must flip but Problem is especially effects the bump map. and light shadow are applies as flipped.


Interestingly if you apply octane displacement to the material. bug doesnt take place in the symmetrical object.

[profbetis]

Very interesting

[oguzbir]

Ok. I did more digging into this.
Take a look at the images below.
The rendered castle towers are symmetry applied object. The part in the middle where you see the gate is seperate object.
Main model is the left part.
Right part is the mirrored / symmetrical part of the object. The problem area is on the right mirrored (by symmetry modifier) part.
The bump displays just fine in the left part at all times.

If the light comes from left or right. The bump shadow and lights applies as if the bump was inverted.

(Bottom image) With the same setup, the difference is the main light is coming from top.
The bump seems like it displays as it should be in all places. But there is a minor difference same as the old lighting scenario, the bumps the left and right acts as flipped in the right hand side of the castle.

So I guess the problem lies in the bump map invert function is triggered (only on X axis) when using the symmetry modifier.
Please solve this.