His works are pencil sketches tinted with watercolour, gouache and sepia. The team created some backgrounds using "Acryl Gouache," a mixture of acrylic paint and gouache. A portrait miniature is a miniature portrait painting, usually executed in gouache, watercolor, or enamel. An artist might paint with acrylics, gouache, poster paints, or watercolors. Vallayer-Coster concentrated on floral paintings in oil, watercolor and gouache. His media include watercolor, gouache, oil, and pastel. Merian painted with watercolors and gouache, instead. Her illustrations include a variety of skills such as watercolor, oils, gouache and pencil. Nevertheless, this collection contained floral studies in oil, watercolour and gouache. Gouache paint is similar to watercolor, however modified to make it opaque. Each page is illuminated in full colour in gouache and watercolour. It usually refers to opaque watercolor, known as gouache. He began painting professionally with acrylics, gouache, and oil-based enamel. Contemporary grounds include acrylic gesso, gouache and commercially prepared claycoat papers.