No you don't have to buy ASCA for the "whispy cloud effects", it's a feature of AS16. I know because I have AS16 and only use REX Soft Clouds with it.

 

 

I currently own AS Next...

 

If I get just the AS16 (not the ASCA) would I get the whispy cloud effect on my windshield? The ASCA textures are don't look as good as REX

 

Just to confirm, addman is correct: the effect you get whilst flying through clouds (it's not completely accurate) is an AS16 feature, and not an ASCA one.

I sent an email to PC Aviator and got a positive reply 1.5h ago:

Dear Thomas,

 

We apologize.  We had a tropical storm his South Carolina, and could not
make it to the office to turn on the sale.

The products are on sale now.  Please see below.

http://www.pcaviator.com/store/home.php?cat=928

 

Sincerely,

 

 

Customer Service

PC Aviator, inc