I wanted to check out something I was working on a while ago and I noticed the transparency is just black now.

I tried reimporting the desktop friend example project and it does the same without changing anything. The desktop friend demo is still transparant though.

I haven't tried it with shapes, just the per-pixel transparency.

Microsoft have been rolling out the so-called “optimizations for windowed games” over the past year and some, which have it that if Windows thinks that a game isn’t going to use some feature (like window transparency!), it might render the game in a faster way that doesn’t allow for that.

And yet this doesn’t happen if you compile with YYC! A mildly mysterious black box.

Ah okay, good to know. Thanks for the link and the different workarounds!