The ability to readily discriminate between natural things and synthetic mimics in our environment is an important tool for many species. Making these judgements relies on the acuity of the different senses, and the material characteristics of the objects at hand. Here, we investigated the relative contribution of vision and touch, alone and in combination, to the categorisation of wood stimuli as natural or unnatural. Further, we examined the brain correlates associated with the perception of these stimuli as natural across the different modalities. The stimuli comprised of eight wood samples, four consistently judged as natural and four consistently judged as not natural, based on results from a previous categorisation study. Behavioural results indicated that natural and unnatural stimuli were perceived as such, although performance varied as a function of modality. Specifically, performance was better when vision and touch were used simultaneously. Preliminary analysis of the neuroimaging data indicates that neural differences exist between the unimodal and bimodal conditions when the stimuli were perceived as natural. These results will be discussed further at the conference.