Have tried Photoshop ( merge to HDR pro ), Nik and Luminance, none can produce a natural looking results. will appreciate some experience sharing. This is the result of Nik :
Use the HDR merge function in Adobe Camera Raw which is what opens first when importing an image into Photoshop. Just select all the photos you want to merge and right click and “open in Photoshop.” This is the same HDR function in Lightroom or Bridge.
HDR Pro is a legacy HDR function of Photoshop. There may be uses for it but getting natural looking HDR photos isn’t one of them.
The Merge HDR function on Camera Raw will merge RAW photos into one RAW composite retaining all the original RAW data so you can do it up however you’d like. As far as I know it’s the only HDR process that merges RAW data and not just the Raster images made from the RAW data