Sun path shadings strange lines

[Mirco]

Hi all,

I've got some problems perfoming the sun path analysis because of the presence of additional lines in my model.
Someone can explain me what these lines are ad how I can delete them in order to obtain a more readable image?

I link some images to better understand what the problem is:

Image 1
Image 2

Thank you,
Mirco

[PCully]

I think this can happen for some larger models, does it happen when you have a smaller model?

There are still some optimization tasks outstanding for Model Viewer ll and I think this is part of that task

Phil