please don't ever use a characteristic texture made by strictly following a tutorial, especially a well known tutorial. in this case it also just doesn't fit with the rest of the scene.
Check out the Toolbag Setup section of the Toolbag Baking Tutorial here: https://www.marmoset.co/posts/toolbag-baking-tutorial/ It covers the quick loader and various other aspects.
If you're willing to try out Quixel SUITE, you can follow along with this tutorial from Blair Armitage: http://quixel.se/tutorial/ddo-painter-for-characters/ :)
@BringMeASunkist : Hey thanks for the tutorial, I had Marmoset already installed but I didn't know how to use it. So thanks for that, Going to watch the tutorial now.
Check out Tim Bergholz' tutorials: https://gumroad.com/timb He has one on rendering weapons in Toolbag. "Ultimate Hardsurface Weapon Tutorial Marmoset Renders"
I made a short image tutorial for cutting basic holes into meshes. Maybe it will help. http://seanvangorder.wordpress.com/2010/10/25/tutorial-cutting-holes-into-meshes/
I wouldn't be so sure about that :) Assuming you have V-Ray, buy a few of these tutorials. They are AMAZING. http://viscorbel.com/product-category/premium-tutorials/
Go through some free material tutorials on Pixar website. Should give you a good start. https://community.renderman.pixar.com/article/113/bitesize-tutorials-materials.html
Yeah thats the tutorial : http://www.philipk.net/tutorials/materials/metalmatte/metalmatte.html its the good "old" highpoly way.. thought there is a way with ndo in combination of maya and udk
Couple tuts http://www.moddb.com/games/cc-renegade/tutorials/lightmap-tutorial (except don't set Flatten Map spacing to 0!) http://www.translucency.com/araya/