Rusnak's drawings and tiny paintings, composed of numerous layers, are informed by her time in the natural world as well as by representations that describe nature such as: digital images, scientific representation as well as natural and manmade patterns. Lichen, nests, fungi and tree galls hold a particular fascination for Rusnak who is also curious about how natural phenomena can be interpreted as metaphors for feelings and emotions.
Rusnak's painting process is organic and emergent. She builds up the dozens of layers of colours, shapes, patterns and textures that intertwine, overlap and obscure each other. Fragments of the natural world show through and then are immersed again into the complex arrangement of layers. Often she creates unusual effects in the work by using inventive painting techniques, such as employing sanders, grinders and dremmels as mark-making tools.
Her art practice also includes a branch of research where she investigates ecologically sound/non-toxic art practices. She makes her own watercolour and oil paints from earth pigments and other natural ingredients. Her sculptural work is made from materials such as: reeds, willow wax, paper, wool and natural dyes.