Of course I've read the abobe help and manual but I still don't manage to keep transparency while saving an ai-file
into an EPS.
What I did is the following:
I created a rectangle with rounded corners. Before adding an outer blur effect (Effect > Stylize > Outer blur) I selected Effect > Document Raster Effects Settings and put the resolution to 300 ppi, background to transparant, Options: Anti-alias, Add 0 mm Around Object and Preserve spot colors when possible.
Then under Edit > Transparency Flattener Presets I choose the [High Resolution] preset.
After having a simple example to test, I saved this ai-file as an EPS and opened this EPS file in Photoshop.
What happened? I lost transparency.