Ambient Occulsion broken with scaled screenshots

To replicate, simply take any model (here I used a cylinder source geometry) and turn on ambient occlusion. Then save a screenshot to disk, but use the x2 option to increase the output resolution.

Original resolution

2X Resolution

4X Resolution

This is the expected behavior since SSAO is, as the name indicate, computed screen space.

But we can definitelly open an issue to see if there is a solution.