Z Elevation: does it scale collisions?

What does changing z elevation do exactly?

Does it scale the sprite's size as well as it's collision area (regardless of whether I'm using bounding box, per pixel collision, etc.)?

What is the scale factor for each camera distance value? I would like to know exactly how big a certain sprite will be under the different possible camera distances (a mathematical function would be the best answer I guess). Thanks.

Z Elevation just changes the visual distance the object is from the camera. Collisions aren't scaled when the Z Elevation is changed. You can change the camera distance with the application property "Eye Distance (3d)". Z Elevation can effect the draw order of objects if the layer property "3d layering" is enabled. An object will appear to be double size if it's Z Elevation is half the eye distance.