Example of discretized version of SCExAO’s pupil using a square grid, aligned with the center of the aperture. Only the virtual subapertures for which the transmission, which was determined as the normalized intersection between the virtual subaperture and the underlying pupil, is greater or equal to 50% are kept as valid subapertures contributing to the model. The s = 0.42 m pitch value was chosen so as to fit an entire number (here 19) of subapertures across the pupil diameter.