I've decided to do a direct scene-to-scene comparison between the uncompressed videos sourced from PAX East and the 35 minute dev commentary gameplay video.
As shocked as I am, there are
no discernible quality differences between the footages.
I've made comparisons between 4 specific scenes:
1 -Cloudy mountains in the distance
2 -Foliage quality
3- Draw distance
4- Rock texture quality
If anything looks different to me, it is the very obvious vignette (darkened corners) + contrast (notice the extremely white clouds) filters applied on the 35 min. gameplay video
Link to full album:
http://imgur.com/a/991le
So here's my conclusion.
There is no downgrade between the 35 min. footage and PAX/GDC.
There is a downgrade between
VGX (not debut trailer) and every ingame footage seen to date.
Why? It looks like VGX was rendered to look as good as possible without the imperative of displaying playable ingame footage. Particle effects, ubersampling, HairWorks, extremely high-res textures, amazing water quality, superb contrasts, bokeh, vignette, sharpening filters, exposure fix, immense draw distance on the eagle-view town scene, color balance, etc. etc.
With that said, we'll most probably never get this type of quality ingame with the shipped game. Those rendering features were never meant to be included in the final product.
Expect to get the GDC/PAX/35 min. quality ingame, or cancel your pre-order.
That's it for me guys.