Shader problem

the shader seems to reflect differently when rotated. although the reflection is turned off. how can it be corrected. any suggestions why it is lit differently when rotated?119443-screen-shot-2018-06-24-at-121722-pm.png

Rotated in what axis? What shader are you using? Are you mirroring it’s scale (form 1 to -1)?

rotate 90. inverse x. it does not seem to work with negative rotation. got myself a shader puzzle here. think its the normal angle. but I’m not sure how i can edit that.