The best settings for the texture?

http://4.bp.blogspot.com/--ASgR0aORq4/Uz1h6tC2OJI/AAAAAAAADuQ/i2xn5iR6XLQ/s1600/2014-04-03+15_24_44-ShooterGame+-+Unreal+Editor.png

http://3.bp.blogspot.com/-bs52-5bhKFk/Uz1h5JIvQ6I/AAAAAAAADuI/fSrPMRYrrbI/s1600/2014-04-03+15_25_44-Palette.png

Your question is too vague. I’m guessing you are having problems with your normal map. If that is the case then make sure it is saved as an 8bit PNG or TGA, and the compression setting is set to Normal Map in the editor.

Btw, you don’t need metallic for a tree bark material. Just leave it empty or plug a constant 0.

The best setting for the bark of a tree.

I am marking this as answered for tracking purposes.