Techniques are provided for propagating real world properties into mixed reality images in a see-through, near-eye mixed reality display device. A physical property from the real world may be propagated into a virtual image to be rendered in the display device. Thus, the physics depicted in the mixed reality images may be influenced by a physical property in the environment. Therefore, the user wearing the mixed reality display device is provided a better sense that it is mixed reality, as opposed to simply virtual reality. The mixed reality image may be linked to a real world physical object. This physical object can be movable such as a book, paper, cellular telephone, etc. Forces on the physical object may be propagated into the virtual image.