Adjusting focus in mockups

Thanks again for this class! I really enjoyed the demonstration of the field blur tool - I'd been using other blur tools before this.
I added the same semi-regular tesselation I've been using for Mockup Academy, but changed the colours. I had some trouble with the compression of the edges on an active selection of smart object - I can make it work with regular artwork but for the smart object I've just been using an arch warp and manual adjustments.
Image credit: Hans Vivek on Unsplash (from the class link)