Apparatus, systems, and methods may operate to create a virtual image, define usage privileges associated with the virtual image in a description file, and associate a coded summary of an encrypted version of the description file with the virtual image. A storing circuit changes a stored value by a predetermined value in response to the refresh request signal and returns the stored value by one in response to a refresh operation. An optimal roof facet is obtained by analyzing lidar point clouds to overcome the low pitched facet issue. 2-5 minutes at T2, and T2 is higher T1 by at least about 30\xb0 C.