  A method for ray-tracing through n-body simulations has been recently
proposed. It is based on a periodic universe covered by simulation boxes.
Photons move along appropriate directions to avoid periodicity effects. Here,
an improved version of this method is applied to simulate lensed CMB maps and
maps of lens deformations. Particle mesh n-body simulations with appropriate
boxes and resolutions are used to evolve the nonlinear inhomogeneities until
present time. The resulting maps are statistically analyzed to look for
deviations from Gaussianity. These deviations are measured --for the first
time-- using correlations for configurations of n directions (n being smaller
than 7). A wide range of angular scales are considered. Some interesting
prospects are outlined.
