Portfolio Image Dimensions

Hi, stunning theme!

I’m hacking it up a bit to make this site
undergrowthproductions

I’m trying to make the home page portfolio posts rectangular.
By expanding the width of the posts in first 2 sections of the home page to 48% we’ve achieved this.

With the last 2 sections, we wish to keep at 30%, but make them rectangular.

I’ve used this css to make the featured image be contained by the .post width

.posts #in-development .post {
	background-size: contain;
	background-position: top;
	background-repeat: no-repeat;
	display: inline-block;
	height: 100%
	}

but I can’t actually limit the height of the .post – and therefore when you hover the .post-overlay remains square.

We don’t need to set the dimensions according the the background-image, just need to set height or max-height across the board…

Any clues to point me in the right direction would be heaps appreciated – I’m kinda lost right now.