Hi @niklasramo,
Currently, we only have options for layout as mentioned in https://github.com/haltu/muuri#layout-
Is pure left to right supported?
Here's the screenshot

Nope, that kind of layout is not baked into Muuri. However, as advertised, you can provide your own layout algorithm. Here's an example how to do it: https://codepen.io/niklasramo/pen/LLbLLd. The example is a bit stupid and not practical at all, but it shows you how to fully customize the layout.
Thank you for showing where to make override. I will close this issue :)
I know this thread has been closed, but for future users who may have similar needs, I edited the codepen provided by niklasramo to provide a better example of the layout requested by the OP. You can find the custom layout here: https://codepen.io/pauldstar/pen/LzEdmp
I know this thread has been closed, too, but did anybody do anything similar with never versions of Muuri?
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I know this thread has been closed, but for future users who may have similar needs, I edited the codepen provided by niklasramo to provide a better example of the layout requested by the OP. You can find the custom layout here: https://codepen.io/pauldstar/pen/LzEdmp