edges broken or phong not correct - corona c4d and OSX

[walterfog]

hello
as you could see in the pictures attached, it seems that corona not read well the tag phong or do something wrong in the mesh surfaces...
the model is the macbook pro and the imac and they always worked well with other engines.. and the mesh are ok....
what's happen??
let me know please
thanks

[maru]

Is there anisotropy involved?

[walterfog]

Is there anisotropy involved?

in fact it seems to be an anisotropy problem... the material got 0,45 anisotropy but if I set to 0,5 the problem is solved... I don't know why this happen.. i'd like to use anisotropy highlight to keep a good aluminum effect in the mac case... I attach you the material so you could see..
thanks for your support

[maru]

This issue seems to be common to all renderers. See this thread for more info and some hints how to solve it: https://forum.corona-renderer.com/index.php/topic,11044.msg70418.html#msg70418