Finished parts have weird lines on them (Lighting bug)

[PatPL]

Do you see these white lines? They disappear, when I'm looking from below at these parts.

Picture from above:

Picture from below:

Source files (only blue engine)

Edited February 15, 2015 by PatPL

[PatPL]

I found out, that these lines disappear in Unity, when you change specular color to black.

Sadly they still exist in KSP, so it's some kind of lighting bug.

Edited February 15, 2015 by PatPL

[Sonny_Jim]

Lightning?

[PatPL]

Lighting, my mistake, sorry.

[CaptainKipard]

Maybe you could slide the shininess slider underneath the material window.

And fix your sharp edges and smoothing a bit. You'll get unpredictable results like this if you don't and if your model is too low poly.

[Starwhip]

Yeah, get rid of your specular map. Basically, it's a "shiny-ness" texture. If you're modelling in Blender, your material slot has a section called "specular". You can set the amount to zero and it will fix your problems.

[Porkjet]

Could you post a picture of the wireframe?

[sumghai]

And fix your sharp edges and smoothing a bit. You'll get unpredictable results like this if you don't and if your model is too low poly.

I think this is key to the issue the OP is experiencing, so I'll repost advice I gave to another add-on author who had similar issues:

Firstly, never use the default Blender shaders - only use the KSP Shaders that come with KSP PartTools for Unity.

Secondly, your issue isn't so much bumped specular or normal shaders, but an improperly-configured smoothing angle:

- In Blender, select your mesh in Object view, then Mesh » Faces » Shade Smooth / Shade Flat

- In Unity, find the import settings for your Blender model, and set the Smoothing Angle to somewhere between 15~45

This will give you smooth curves for the cylinder walls and crisp corners on the cylinder ends, without needing to perform split edge operations described by Kommitz.

[PatPL]

OK, thanks. I removed specular from blender, that is there by default.

[Starwaster]

It's more a problem with fixing your edges and smoothing as Kipard and Sumghai are saying. (but yes, do try to only use the KSP shaders as well)