Not that I know of. You'd have to resize the asset outside of PP to make it look any larger inside of PP.
Did you try to use the basic 3d effect to scale ,in the prespective folder, after you scaled to 600?
Scale to 600 and then nest.
Scale the nest etc.
You can scale 'endless' by keeping on nesting.
Premiere Pro only allows you to scale the image upto 600.
However, We can also try to use Adobe Photoshop to increase the scale size and then import the image back to PP.
Hope it Helps
Thanks for your quick answers.
I'm new to PP, usually working with still photo in Photoshop but I want this to move...
I haven't reached the 3D and nest level yet but I will check it out.
If there is a way then I just have to start digging.