Here's a photoshop action I use to separate scanned lineart from the background onto its own layer, so you can color underneath or whatever. Also useful for when you accidentally start a drawing on the background layer, d'oh.
I know there's probably a billion different tutorials and actions for this already, but this is what I use... so... maybe it'll be helpful to someone else, idk. :IBefore you use this:
- Save a copy first, just in case~
- Clean up your lineart to be black & white! This action won't make any adjustments for you, and I don't think it will work right with colored lineart.
- Make sure your lineart is on the background layer. It won't work right if the layer has transparent areas.
- It will make the lineart whatever color you have selected as your foreground color. Neat.
If you don't know how to use photoshop actions, click here for a tutorial.
Actions are super useful!
Let me know if you have any questions/problems!