So I am working on something for a Roof that I want to be seen... I have in my memory that there is a rule of thumb for object, (like weather vane silhouettes) that can be scaled for every foot of elevation, so that it is not tiny when you finally get it up there...
Anybody know what that is?
Thanks

Matt

Cut out the dsign on a piece of cardboard stick it up there and look at it.

Take a photo of the building. Sketch your design on the photo. Take a known element of the building and use that size as a measure to calculate the size of your work.