This tutorial briefly explains how to use the Lightroom Export Plugin for HDR processing in Photomatix Pro.
Step 1: Select photos and invoke the plugin
You must first select the photos you want to process with Photomatix Pro. The plugin is designed to work primarily with bracketed photos, i.e. multiple photos of the same scene taken at different exposures.
In Lightroom, select one bracketed photo set in either the Filmstrip or the Grid.
To invoke the plugin, right-click (control-click on Mac) the selected photos and choose Export > Photomatix Pro.
Alternatively, you can invoke the plugin by choosing File > Plug-in Extras > Export to Photomatix Pro.