Hello, I want to model trackers in complex topography. I saw in the PVsyst help that for trackers "The program chooses one significant tracker in the middle of the system, and evaluates the shading factor table for this element only, using the neighbor trackers, but neglecting other eventual shading sources." I am wondering, if I define different tracking planes (shading objects) at different elevations, whether PVsyst will take the elevations into account to calculate the shading. If so, how? Does the program pick one tracker in the middle of each tracking plane/each shading object? I was also wondering whether backtracking is always uniform across all tracking planes. I am interested in modelling a case where backtracking is different for different planes. Best regards, Sophie