"Texturing Metal - Part 3 Making the Hole and the round...thingy" by Johny
Hole
Now that we accomplished the other two other parts [LINK] we shall move to the hardest part of this tutorial : Making the hole ( well, this one is quite simple, then a bit forward in the tutorial we will make a somekind of tube orifice, where tubes tend to connect, ussually very seen on space type textures or characters with alot of machinery, and i thought people would like to know better how to achieve this kind of effect .
Lets begin with making a circle selection ( again, dot forget to hold shift while you are making the selection, to make a perfect circumference ) , and , as usual , Feather the selection with 0.5 ( depends on the dimension of the document )
Now with the burn tool, ( large brush, the opacity is at your choice ) paint it inside the selection starting from the top , be reminded that since it is a supression
the shadow follows the lightsource, so this means that it is painted in the direction of the lightsource, like in the image below :
Accentuate the shadows now , but very slightly, in order to give depth.
This step will have a great importance, its gonoing to be the step that will make it look like a hole, wich means, that with the dodge tool we will make with a very small brush ( maybe 5 or 4 pixels ) with some itensity ( around 30 )and paint it in the opposite side of the lightsource , like in the image .
Add a bit more itensity in the highlight using a brush with maybe the half dimension of the previous ( 2 pxls ) DONT FORGET THAT WE ARE STILL USING BURN AND DODGE TOOL
Now to finalize add some highlight with midtone ( 2 pxls as well ) but with very low opacity on the area that hasnt got shadow in the hole, near the zone with more shadow , and follow its shape , and there you go ! a hole in metal that is somekind of realistic, there are various ways onto achive this kind of effect, and it is very easy to do so !
Round Thingy
This little part will give you alot of trouble, i dont know the name for it so it will have to stay "round...thingie" lol , be remembered that my first language isnt English, but Portuguese , so go easy on me... anyways we shall start from the cilindrical surface where the "plug" is inside the supression. For this step it is crucial that we make the right selection, for this step i wont explain it by images, but with test :
-make a sphere selection in a new layer and fill it with a color.
-select the selection again ( DO NOT FEATHER ANYTHING YET ) and contract it , aybe 10 or 15 pixels will do, it really depends, and delete that selection from the color uv previously filled .
- hide this layer and select its slection by clicking CTRL+click on the layer , heres an image below :
