Samples

{
	"$schema": "http://adaptivecards.io/schemas/adaptive-card.json",
	"type": "AdaptiveCard",
	"version": "1.0",
	"body": [
		{
			"type": "TextBlock",
			"text": "Here are some cool photos",
			"size": "large"
		},
		{
			"type": "TextBlock",
			"text": "Sorry some of them are repeats",
			"size": "medium",
			"weight": "lighter"
		},
		{
			"type": "ImageSet",
			"imageSize": "medium",
			"images": [
				{
					"type": "Image",
					"url": "https://picsum.photos/200/200?image=100"
				},
				{
					"type": "Image",
					"url": "https://picsum.photos/300/200?image=200"
				},
				{
					"type": "Image",
					"url": "https://picsum.photos/300/200?image=301"
				},
				{
					"type": "Image",
					"url": "https://picsum.photos/200/200?image=400"
				},
				{
					"type": "Image",
					"url": "https://picsum.photos/300/200?image=500"
				},
				{
					"type": "Image",
					"url": "https://picsum.photos/200/200?image=600"
				},
				{
					"type": "Image",
					"url": "https://picsum.photos/300/200?image=700"
				},
				{
					"type": "Image",
					"url": "https://picsum.photos/300/200?image=800"
				},
				{
					"type": "Image",
					"url": "https://picsum.photos/300/200?image=900"
				}
			]
		}
	]
}