Image slider for Wordpress

General information for the website: Photography Website
Kind of development: Customization of existing website
Num. of web pages/modules: 1
Description of every page/module: We have a Wordpress-Website with the "X Theme" and want on a few pages an image-slider.

The image-slider should be the same look & feel then this one: http://www.nirslakman.com/#!commercial/c15p3

Different image-sizes (different aspect-ratios) always with the same height but different width and the same behaviour & look then the example.

We tried it with the Revolution-Slider but failed to customize it. -> this is the actual status: http://gold-kunde.de/saelzer/architekturfotografie/ -> there is too much whitespace when we have portrait-images
Description of requirements/features: Customize the Revolution-Slider to look like the reference:

- Click on the teased-images left and right slides in the direction
- no animation when a slide is shown
- always the same height but adjusting to the width and align the other images directly to the left and right (not so much whitespace)
Specific technologies required: Wordpress Revolutionslider
Extra notes: