This is the latest gouache Hippeastrum; its a picotee variety with beautiful red edges and sparkly bits. I experimented with iridescent paints for this (not too much though) and like the results. Its taken 5 days and given me neck, thumb and brain ache! The white gouache paint (I use Winsor & Newton & Schminke) and the green mixes also, can be temperamental to get down and I found it slightly chalky this time. Some dabs of white acrylic have helped to bring out the petals.
White flowers are far better painted on a dark background. My painting of Hippeastrum 'Jewel' from last winter was painted on a white background and it just doesn't have the impact. I should have painted some leaves behind the white flowers to show them up - a great botanical tip. The white flowers are showed up by careful shading with warm and cool greys.