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Curved end
Hi!
I bought a model of the truck and changed one of its details. On one of its ends it has square shape. In viewport (QuickShading-Lines mode) it looks like this

but on a rendered image this end looks like it is curved

I have checked geometry of this detail several times, polygons at this end perpendecular to each other, changed materials and lighting, nothing helps. It happened after I cut part of this detail and used bridge to close hole. Could anybody hep me with this issue?
Thank you.