I want to paint blood-splattered walls. Do you have any tips?
Cormac Maguire, US
The key aspects to consider when painting blood are its translucency, hue and texture. Initially, fresh blood will be runny, translucent and shiny. As it dries out on a surface it becomes more opaque, more congealed and more matt in nature. Its colour changes from red to a deeper, darker yellow-brown.
I find that painting blood on its own layer with the blending mode set to Multiply is a great way to simulate blood’s translucent qualities. Layer effects give the blood the illusion of being 3D. In the areas I want to represent as being older, I paint in a layer set to Normal blending mode and use a darker, yellower hue. I then put both of these layers in a group and attach a layer mask to the group. Painting in the mask, I can differentiate the texture, making it more spotty and runny in wet areas, and more craggy in dry ones.
Make sure the blood is fluid and bright where it’s wet, and craggy
and dark where it’s drying. Put your Wet blood on a Multiply layer with an Inner Glow layer effect, then set the Inner Glow’s blend mode to Multiply. Set the colour to red.