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It's more of an art thing than a game design thing, let me speak to the right people and see if we can do something. I don't think it's productive to go into too much detail over everything, but it's nice to discuss the tweaks that appear in the weekly comparisons.
Here's a snippet that shows the portal more clearly:

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I think the idea is nice, and, since you mentioned discussing tweaks, I think it's a good idea to make the portal a bit more... ghosty. I mean giving the stones transparency and tinting the whole portal a bit blue. The transparency would make it look less like sci-fi construction like a
Stargate and the blue color would fit the spiritual nature of the portal more.