VR Zoom, imframe size

[cadjockey]

Hi

I would like to enable zooming on my web VR's but th equality is not good enough when zoomed even a little. I'd like to render out my images at min 1200 width, but display in a frame at say 600 width. that way when you zoom in the quality is retained. (Initial view is just scaled by 0.5) 
However, i cannot see any way of scaling the images to fit the 600 window fully zoomed out initially.  If I adjust the images size the vr does not load, if I adjust the iframe size the image is just clipped.

Is this possible?

If not, please consider this a feature request, its critical to my roll out

Rich