I’ve found a nice article HDR Cookbook – Sharpening to play with sharpening and also I played with Noise Ninja ©PictureCode to reduce noises on the images before merging them to HDR. I was basing on the article HDR Cookbook – The Three Rules of Noise Reduction that seems to be helpful.

The following HDR photo of the big window inside the Lisbon airport was made using techniques described in the articles above and some my tricks.

Inside Lisbon Airport