A very detailed step by step tutorial on how to draw sunflowers. Ten different renderings of the same picture using different materials for each one.
Underpainting Start your painting by creating a “sketch” of the image in paint. Often this is done in a color that contrasts with the palette you have in mind for the finished piece. You can paint over the underpainting entirely using opaque acrylic to cover any evidence of the paint below, or you can let parts of it shine through for a dimensional effect.