Earlier today I was investigating why Psychonauts turns so blurry and low res during freezeframes. Obviously it was a rendertexture issue so I hunted down the function responsible for setting up the rendertexture that it will draw in the background when doing freezeframes. At first glance, I saw that it was indeed using the functions ERenderer::GetDisplayWidth and ERenderer:GetDisplayHeight.
So I thought to myself, "Hmm, if it's based on the display width and height then why-- oh."

No points for guessing what ERenderer::GetDisplayHeight returns.