Tara's Wonderous Pigments

You arrange a series of pigment materials in a hemisphere in front of you, with a jar placed behind each one and a bowl of oil or water in the center. While channeling the spell, each pigment will periodically rise and float into the liquid to mix and blend into paint, after which it will arc back over into its respective jar to be stored for later use. 

If a drawing is made with these pigments on a piece of paper, a command word can be spoken to conjure an illusion of the subject above it. Additionally, pigments can be used to paint an object into existence (i.e. a window onto a wall) and expend a spell slot to conjure it into reality. Spell slot expenditure determined by the size or complexity of what is conjured. 

Lastly, you can speak the incantation of a given spell while creating a set of pigments, allowing modified versions of the spell to be created, learned, and cast if the spells are painted in their altered fashions in the spellbook.