For anyone intrested in testing, I can reproduce exactly what is happening, and I beleive it has something to do with the scales of the scenes with Carrara 6 and the Isometric camera(this happens to me on PC too).
To reproduce this;
1-open a new empty scene in Medium 30ft scale scene or higher.
2-place a sphere(any primitive) centered in scene/viewport.
3-create an Isometric camera near, or at the default Camera location, and point it at the sphere(or use "point at modifier" and select sphere). A 4 viewport setup is best for views.
4-Ctrl+Alt+F, or check the "Show Production Frame" under "View"
5-with the Isometric camera selected in a viewport(top left corner should say Isometric) notice that the prodution frame is too large. Shrink the production frame to fit it all in the viewport by grabbing/dragging the corners etc.
6-in Render Room, set rendering camera to Isometric and render.
Notice the sphere will render very close up(too large for production frame) and not what the production frame shows for the Isometric camera view. Workaround->..use inches scale only for a scene, or copy a created Isometric camera from an inches scale scene, to get a more accurate production frame render. Correct me if wrong or if I left anything out.
