Viewport shading problem?

[Anonymous]

I'm fairly new to 3Ds Max so I apologize in advance if the solution is obvious.

I cannot for the life of me figure out why those two objects look different in the viewport even though the exact same colour is applied to them.

I'm trying to model a simple chess set, I'm drawing the profile using the line tool and then applying the lathe modifier. 

I'm using 3Ds Max 2018 (student version), on Windows 10. Any help is appreciated because this is driving me crazy

EDIT: 

I just noticed that this problem only occurs when using the colour black, I tried other colours and it works just fine.

[miledrizk · Accepted solution]

Hi,

In the first screenshot, the totally black object has a flipped normals,

Select it and in the Lathe parameters rollout check the option Flip Normals,

I guess the white color in the second screenshot is an applied material and not

A wirecolor. You can test this by removing the material and making the objects black

Again and test. You need to understand that each Polygon has an outward face direction(positive normal)

And an inward face direction(Negative normal). You can, on the internet, check the role of normals

In 3D applications. The totally black object has its positive normals pointing 

To the opposite direction of the view, that means you're looking at its back faces

Where normals are negative.