Here is the full list of all 39 uDraw Studio: Instant Artist achievements worth 1,000 gamerscore.
Saved a Painting with all of the Different Canvas Types
Explored all Art Starters
Completed three Color Lessons in Art School
Complete all Art School Lessons
Completed three Painting Lessons in Art School
Completed three Drawing Lessons in Art School
Watched a Slideshow of your Gallery Paintings
Saved a Coloring Book Painting in the Gallery
Saved a Numbers Painting in the Gallery
Explored all Art Camp Activities
Saved a Connect The Dots Painting in the Gallery
Dragged and Dropped a basic color into the Palette Wheel
Saved a Custom Palette
Used all the colors in the Palette Wheel in Tilt Painting Freeplay Mode
Completed 2 Levels in a row without losing a Life in the Alien Splat Game
Complete Level 10 in the Alien Splat Game
Exported a Painting
Saved a Painting in the Gallery
Completed any Art School Lesson
Applied an Effect Filter to a Painting
Created artwork using an Animated Stamp
Activated an Extended Tool Tip
Painted with the Fingerpaint Brush
Completed Level 1 in the Tilt Maze Game
Completed Level 10 in the Tilt Maze Game
Completed a Tilt Maze in 60 seconds
Completed all 40 Tilt Mazes with a total time of less than 40 minutes
Selected a Different Stroke Mode in the Brushstroke Menu
Activated the Lock Palette feature
Painted with the Splatter Brush
Painted with Each Brush Type at least once
Painted with the Calligraphy Pen
Created a Signature Stamp
Explored any Art Starter
Obtained 6 lives in the Alien Splat Game
Completed Level 1 in the Alien Splat Game
Completed Level 5 in the Tilt Painting Challenge Game
Completed Level 3 in the Tilt Painting Challenge Game
Completed Level 1 in the Tilt Painting Challenge Game