I've extracted the crane from the default harbor to make into a prop but when I import it I get these weird shadow lines down the middle when rotating the light. I've tried using normal thief in 3dsmax to change the normals based on both a sphere and a squares but neither have worked, made it worse actually I think. I've had this issue before with models from the 3D warehouse but normal theif worked ok for those in the past. Makes the whole model look really un-natural. Hope someone can help me figure out a solution. Thanks
Here is another shot down the middle, you can really see it happening, it goes back and forth for some reason creating a checker pattern. Even on the silver in the front of the crane.

Here is another shot down the middle, you can really see it happening, it goes back and forth for some reason creating a checker pattern. Even on the silver in the front of the crane.

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