Only supports Windows OS.

The garyscale images can be in png, jpg or bmp format.

The grayscale directory name needs to remain unchanged. Inside the grayscale directory, the 1st level sub diectory and the 2nd level sub directory need to specify the category names. Looks like this grayscale-animal-dragon. The grayscale images needs to put inside dragon -- the 2nd level sub directory. 

User needs to apply all transforms at first and then to add displacement mapping.

User can press Y key to add a floating panel to change the category names.