so yeah. here's how i do it these days; only took about 20 mins to prepare, so i bet if you took twice the amount of time, it would be exponentially better. blame the soccer match i'm watching.
pros:
-didn't have to do any hand painting
-did everything with vectors, keeps it nice and organized
easy to make specular/bump etc
-put your lazy computer to work instead of having it sit around waiting for commands
cons:
-will probably never look as good as if there was some hand paint applied
-it's not photoshop
step 1 - I drew a mondrian of boxes, one for "insets" and one for "panels". colored them by depth, then used "combine paths" to turn each layer into a solid vector shape
step 2 - I used "inset path" to give myself more iterations of levels and colored accordingly.
step 3 - applied "inner glow" and "outer glow" to somewhat preshade my panels
step 4 - applied some crusty rusty textures via pattern fill (thankyou cgtextures.com) and then used contrast and saturation filters to reduce the glaring differences. looks like shit, but hold up, not done yet
step 5 - baleeted my filters on each layer, and added new ones with high contrast and complete desaturation. adjusted using "lighten" filters to match with their vertical layer. this gives us a cavity map, which we can use in a moment directly to render a final texture, or you can turn it into normals pretty easily if you'd like the game engine to do it for you
step 6 - deleted filters again, and applied a strong contrast filter and desaturate to each layer. this will be our specular map.
step 7 - open your favoured 3d rendering program, create a plane, apply textures to said plane, add some lighting (here there is red from the "top" and blue from the "bottom" and then render a nice big 2x image. crop rendered image back to the size you'd like. your cake is now complete, do not use the bos to lua conversion page if you are pregnant or suffer from a heart condition.
"metals1.png" should have everything saved as layers.
edit: this is by no means the best metal tutorial, it may well be the worst (i screwed up my preshading)
