Keep original aspect ratio on gallery "grid: simple"

Site URL: https://decagon-octagon-8sc3.squarespace.com

Hello! I am trying to create a gallery that keeps the tops of each row in line, but also keeps the original aspect ratio of each image, but also has a lightbox. This seems like it should be relatively simple, but for some reason I can't do it. 

On the gallery block "Grid: Simple" there is no "original" aspect ratio option. On a List block I can keep the original aspect ratio, but cannot enlarge the images in a lightbox. Please let me know if anyone has figured this out!!

What I want the page to look like:

Hello,

Please share the private viewing password so that we can see the issue and test in the context of your website.

Thanks,

Dan

36 minutes ago, Wolfsilon said:

Hello,

Please share the private viewing password so that we can see the issue and test in the context of your website.

Thanks,

Dan

I've removed the password. I want the look of Portraits, but the lightbox function of Atmospheric Expressionism.

Thanks!

Adding a light-box will be difficult here without a plugin. Esspecially since you want to keep the aspect ratio options. I'd recommend that you consider purchasing or installing your own light-box plugin to help you do this.