Just showing you guys how to make your linearts smoother and cleaner with some techniques I learned. :D Hope this helps!
Before you sketch take these steps to get started.
Place your layers like so:
Very top layer: LINEART
3rd to last: Other
2nd to last: SKETCH
Very bottom: BACKGROUND/BG
THIS IS VERY IMPORTANT.
After that, place your Opacity to 145% and Smoothing to at least 40%. Make sure you selected the Pencil tool while doing this.
This is the sketch I did. With the Smoothing changed the lines are WAY easier to draw. (especially if youre a perfectionist XD)
(sorry my comps being dumb so it cut off some of the picture)
After youre done sketching place the opacity of the layer to 51%. This makes the sketch fade a little so you can start your lineart.
(This is the lineart drawn, with part of the sketch erased so its more clear.)
Select the lineart layer.
Place the opacity to 194 and then start drawing. This is my result.
**NOTE: I didn't do any line thickness or any techniques yet, just simply draw.**
Now this is the fun part :D
Zoom in to the part your gonna work on first, choose the Eraser tool, and set it to size 5.
To make your lineart much smoother looking, SLIGHTLY erase the end parts of the lines.
**NOTE: The circled parts are the parts where I erased.
When you erase SLIGHTLY, the dark black will fade to a lighter gray, maybe almost white.
Youre gonna choose the pencil tool now. (the very first tool)
Place the opacity to 194.
Right next to where you slightly erased you're gonna trace the lineart a couple of times to where it looks very dark.
**NOTE: The circled parts are where I drew.
When you zoom out, the lineart is very smooth and clean looking. :D
Oh yeah my computer acted up again, so the words really say "Looks cleaner and smooth <3"
Now for the SUPER fun part 8D
Choose the pencil tool again.
MAKE SURE YOUR SMOOTHING STAYS THE SAME.**
You're going to outline your lineart again, this time with FULL opacity so that it's SUPER dark. :3 You don't have to outline the entire lineart. You want the vary the line thickness.
Choose the Eraser tool again, and place it on brush size 5.
Erase some parts of the bold lineart to vary thickness. Remember to erase SLIGHTLY.
**NOTE: The circled parts are the parts I erased.
When you zoom out, the lineart looks professional and smooth.
This is a comparsion between the simple lineart from earlier (right) and when you vary thickness. (left)
(LOL I didn't feel like finishing the rest of the pic so this is the end)
Hope you learned something! :D