a few notes:
1. take multiple shots with different exposures on site. mas maganda kalalabasan kesa sa iibahin mo yung exposure sa RAW file, or yung jpeg iibahin sa photoshop. yun yung sinasabi kong "pangtamad".
2. clean the images first in Photoshop, then use photomatix to create the HDR, then postprocess using Photoshop.
3. Use PHOTOMATIX!!
4. use a tripod,
5. each shot, must have the same ISO, whitebalance, aperture value,. play with the shutterspeed to over or under expose.
6. work in 32 bit channel.
7. it helps if you use a circular polarizer, it really helps a lot.