[vankessel]

Use non spatial dimensions as well, like color, size, and shape. You can also use clever projections like t-sne to reduce the number of dimensions while retaining some of the structure of the data (https://www.youtube.com/watch?v=RJVL80Gg3lA)

[Der_Einzige]

There's an improvement to T-SNE called UMAP

[bitL]

I've used them both recently and couldn't really tell which one is visually better; UMAP is supposed to be a bit faster though.

[mirimir]

Thanks, that's very useful.