This document proposes a novel multi-factor authentication scheme called object password that combines textual passwords, biometric authentication, and graphical passwords. Users navigate a 3D virtual environment and interact with various objects to set their unique password. The object password scheme aims to provide increased security over traditional authentication methods by utilizing human memory and recognition. It allows customization by letting users choose which authentication factors to include in their 3D password. The proposed system is described and guidelines for designing effective 3D environments are provided. Experimental results suggest the approach succeeds in authenticating users.