Fill in the Blanks Fill in the blanksOnline version read the text and complete by Brayan Cardozo 1 palette dimensional opaque piece underpainting : Start your painting by creating a " sketch " of the image in paint . Often this is done in a color that contrasts with the you have in mind for the finished . You can paint over the underpainting entirely using acrylic to cover any evidence of the paint below , or you can let parts of it shine through for a effect .