Questions on episodic format

[mastapenguin]

I know that, in Episode 1, Valve has put small tweaks into the source engine as well as improvements of models, graphical quality, and so on.

I also expect that such improvements will continue onward into Episodes two and three.

My question is, will this be "backwards compatible"?

i.e. Will the Breen in HL2 also get graphical updates or will Episode 1 benefit from the engine tweaks made for Episode 2?

I know I'd like to take a closer "in-game" look at the graphically updated Breen...

 

[Greatgat]

Nope, the original graphics are still the same. It would be a cool idea though.