You craft a brush with a white wool and a stick.
Craft paint with a bucket of water and dye.
Set the can of paint on the ground. Hold your paint brush and click on the can. You can paint 3 nodes before having to get more paint from the can. Each can has 100 uses.
You can use 1 brush for all the colors. If you want to change color just click on the paint can you want.
Modders can use this mod to allow their nodes to be paintable.
Supported mods include
mypaint_sample - a sample mod for testing or making mods
mypaint_extras - a modpack that lets you paint default things in the world.
Depends - default
Download - https://github.com/DonBatman/mypaint/archive/master.zip
Github - https://github.com/DonBatman/mypaint
Licence - DWYWPL