juhnu: Yes, but have you actually tried this?
I mean, surely, I can not be the only one trying to use this feature in dx with radeon?
Ok, luckily I am only trying to write the A-channel, leaving RGB as they are. Hence I can use the following config:
AlphaBlendEnable = true ;
SEPARATEALPHABLENDENABLE = true ;
SrcBlend = zero ;
DestBlend = one ;
SrcBlendAlpha = one ;
DestBlendAlpha = zero ;
Instead of my first attempt which should have the same effect:
COLORWRITEENABLE = ALPHA ;
So problem avoided for this time. But somewhat unsatisfactory, I think.
Still interested in hearing about your experiences with this renderstate, though.