I just released an update which has a shortcode named [show_portfolio] which hope meets your need. Pls have a look at the below page –

https://www.livemeshthemes.com/enigmatic/portfolio-shortcodes/

The shortcode is –

[show_portfolio number_of_columns=3 post_count=12 image_size='medium']

I should mention though, that you cannot limit the categories here by providing taxonomy terms. I was not sure that is your requirement.