Hi Michele,
If we change the axis tilt spread, we are getting very erratic results. Moreover, when we are using terrain following trackers we expect the tilt spread would not be even, the comparison is being done with far East tracker with far West tracker table which its expected to have this difference. Thats the sole reason we are doing the 3D shading to assess the impact on the EYA and electrical shading. Again, sometime even without changing this parameter the shading scene is running. Please can you look in to this issue.