Crude signifies the rough or unworked part of creation. It has been given form but is as yet unrefined and has not been differentiated.
Psychological / emotional perspective: Crudeness suggests the rawness of emotion which has not yet been allowed proper expression. It also suggests instinct as opposed to intelligence.
Material aspects: In terms of everyday life, if an article seems crude in a dream, a plan or idea has not yet reached fruition or been properly considered.