Two way matching (left->right, right->left)

[spinzello]

I usually switch the images (and turn 180°) and run the model a second time to get a stereo-match from right to left. This enables me to perform a consistency check between the two disparity maps. However, this is inefficient, since some modules perform the same calculations for both directions (e.g. the feature network). Where would be the best way to split the model into two paths, where either path performs one stereo-matching direction?