That is cool! Love the corners and edges.

Thank you. I like the way colourised plasma on a grain merge layer marbles the object.

Mandelbulb sure allows for a lot of coolness. Nice pick and mirroring here.
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Griatch

Thank you very much Griach.

Cool shapes maybe a bit too dark in the shadows, more visible details on the entrances (seems 1 central and 2 lateral but the shadow is too dark to see well ) could add some more interesting detail

nice work anyway and nice title, and interesting reference to Eris

Nice, i like it

Thank you both. You're right PC. If I had the colour the way I wanted it, the shadows would have been even darker. I had to compromise.

I like the deep shadows - makes it look a little more foreboding.

I do like the textures Erisian. Amazing how good algorithmic renders can come to create realistic scenes.