It's a native look-and-feel UI with a 3D viewport embedded ( which you can disable completely so no extra rendering time will be used in case you want to execute just the HM2NM tool, etc ). I changed the right-collapsible window by floating/docking windows though... in that way you can move the windows with more freedom or…
amazing ideas! thx all! MoP's screenshot looks like the thing I got in mind. But i think gonna move the viewer options(show normals, show wireframe, etc...) into a "Display" menu on the top. Also gonna add an option to decide which RGBA channel the output will use ( for example, AO in red channel, thickness in blue…