The primary object in RML is the gallery. It can only hold pictures and nothing else. You'll be using them most of the time to actually choose what to show. They must be part of a collection. When choosing one of your Real Media Library galleries in JIG, it'll automatically load its photos and open them in your desired lightbox. To update a gallery, you'd edit it in the library and not via the JIG shortcode. This essentially brings centrally-managed galleries to JIG, which update automatically on your page when you change their contents.
Showing RML galleries with JIG

Twilight time
at a Maldives beach
So many hues of blue
above the sea, after sunset
Young happy couple on the beach
sitting in the sand enjoying each other
Curvy hut
in sunset at the Maldives
Maldives
huts on water
Tranquil island beach
with coconut trees and turquoise ocean
Romantic restaurant on the beach
beautiful night seascape at a luxury resort on Maldives
Foot prints in the sand
along a beautiful sea shore with distant hills at sunrise
Beautiful sexy surfer girl
on the beach at sunset holding her board
Luxury beach resort
bungalow near endless pool over sea
Formentera
wooden pier in Illetes beach, Balearic Islands
Luxury romantic place for honeymoon
the view from inside of a wooden bungalow on the water
Beautiful sunset
at a Maldivian beach
Sunrise
over Hanauma Bay on Oahu, Hawaii
My face above the water
My feet can't touch the ground
Waves at Seychelles
sandy and sunny
Sunset on the beach
Takamaka, Mahe island, Seychelles
Barefoot couple
on a peaceful jetty at a luxury resort
Green tree
on a white sand beach
Ibiza Es Porroig
also Port Roig view at Balearic Islands of Spain
Balearic beach with palm trees
Sant Antoni de Portmany, Ibiza
Fit woman
practicing yoga at seashore
Young woman in hat
relaxing on the beach
Message in a bottle
on a white sand beach
Couple in the sand
only their feet shown, on a tropical beach
Woman's legs
at beach jetty, Maldives
Panorama shot of a tropical island
on Lhaviyani atoll, Maldives
Beautiful beach bay with azure water
Cala des Moro, Mallorca island, Spain
Happy young couple
relaxing on the beach
Couple relaxing
in beach hammock
Cute couple just chillin
Princess Consuela Bananahammock
Panorama of beach
on Maldives in dusk
Young woman reading a book at the beach
cute huts of the resort in the background
Couple in white clothes
on a pier at the Maldives
Couple with matching colors
sunbathing at the Maldives
Woman on a tropical beach jetty
at Maldives
Beautiful beach with jetty
at Maldives
Young woman
lying on a tropical beach
Maldivian evening
at a calm white sand beach
Couple in sunglasses
on a tropical beach jetty
Couple walking together
on a tropical beach at Maldives
Sunset on Maldives
at a resort with water villas
Sandy beach with palm trees at sunset
Alona beach, Panglao island, Philippines
Sunset at a beach resort
with pool and palm trees
Ocean wave
falling down at sunset time
Las Americas beach
in south Tenerife at Canary Islands
Los Cristianos beach
Arona Tenerife south at Canary Islands
Romantic dinner
at the Maldives
Sunset on the beach
Caribbean sea, Dominican Republic
Los Gigantes cliffs
behind the palm tree in Tenerife, Canary Islands, Spain
Sea sunset
with long exposure waves
Playa de Papagayo
Lanzarote, Canary Islands
Untouched tropical beach
in Sri Lanka
Water villas
over tropical coral reef
Water villa cottages at sunset
on island of Kuredu, Maldives, Lhaviyani atoll
Paradise
jetty on Isla Mujeres, Mexico, Cancun
The above example uses the following, generated shortcode (how to use):[$justified_image_grid preset=16 last_row=flexible load_more=click initially_load=10 load_more_limit=25 rml_id=17]
Straight to lightbox: galleries open in lightbox groups
In this case you actually select a collection in the JIG shortcode. However, opening its child galleries will not result in navigating to a different page. The content of the chosen gallery opens straight to the lightbox. There are two distinct lightbox groups that you can observe in this example. This is a unique feature of Justified Image Grid and cannot be achieved with native WordPress in any other way. Normally you'd need to use another source.
The above example uses the following, generated shortcode (how to use):[$justified_image_grid preset=3 lightbox=magnific mobile_lightbox=magnific rml_id=3 rml_lightbox_groups=yes]
Why show Real Media Library galleries with Justified Image Grid?
Take advantage of all visual styles JIG has to offer and no longer worry about cropped images.
Replace the default look of the built-in WordPress gallery, which RML uses out of the box. Say goodbye to cropping and enjoy dynamic captions, filtering, special effects, the best lightboxes... You'll love the simplicity and have a well-organized media library.
- Optionally, Justified Image Grid can automatically take over existing RML shortcodes - basically these are just galleries.
- The thumbnail order is managed by JIG - it can be based on title/date ascending/descending and random.
- Show corresponding metadata on the captions of the thumbnails and in the lightbox.
- Thumbnails are not cropped to a fixed aspect ratio, unless you need that style.
- Enjoy the benefits of all other Justified Image Grid features.