Paint 3D is the latest evolution of classic Paint, with a ton of new art tools to try on your 2D canvas or 3D objects.
Explore the brushes and tools in Paint 3D from the Art tools menu. First, choose a color from the color palette, or use the eyedropper to pick up a color already in your workspace. If you want to add custom colors to your palette, select + Add color.
Once you have the perfect color, select a brush to use and paint right onto the canvas. Or, try dropping in some basic 3D objects or models (like the fish) from the 3D objects menu to start painting in 3D.
Most of the art tools, like the marker and pencil, allow you to adjust the thickness and opacity of your strokes. Try playing with these sliders to change how your sketch looks!