I know exactly what you mean: that has always been one of the core things that appeals to me with in-game creation tools. Like you, I'm also an artist in more traditional mediums, which gives you a lot more freedom to create something that completely matches your vision. But there is something very satisfying about working within the limitations of a creation system's tools (finding "hacks" or work-arounds to recreate a certain look, element, or effect) to reach a particular goal. :) From your description, it sounds like the SFVI editor is at least a little funny to experiment with, so I will have to check it out!
Yes, that does sound appealing, both in terms of playing the game with the creation, and having more poses for snapshots, which can actually help a lot with selling a certain design.
Must warn you, if you jump in you need to learn method content is released, otherwise you risk to lose items that you can't recover afterward
Here short guide
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MONEY System
Fighter Coins (azure) = real money only (with 1 single exception i will say later)
Drive Tickets (purple) = earned playing or even during automatic events (example it's a character's birthday, you get gift)
Average piece price iirc is 200 FC or 4000 DT
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STORY
World Tour (story mode) will make you find lot items playing the game, but are also most basic ones... but example my Fei Long in the vid is made all with WT pieces
Kinda safe most stuff here if missed you can return in places till you find everything (maybe few side missions are one-shot deals, so still recomend do your run with an items guide)
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TIME WINDOWS events
Fighting Pass -> a monthly event (that end at certain day) where you unlock prizes by raising levels. Tricky part is to enter your first FP you must pay real money as price is 250 Fighter Coins.
But very last levels of FP are ONLY case you can gain these coins by playing
So essentially you need pay first FP month, then completing the run 100% every time you will have money to buy next and next and so on
Shop is window-time too
Any item in the shop will have expire date will no more be avaible
Collaborations
Sometimes SF6 collab with other brands, time window there too
Prizes may be free or treated like normal shop items
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If seems confusing as fuck is because it is lol
Overall real money items have otrageous price, but playing lot you can save lot of DT and if you don't waste it to buy other stuff (music, art etc) you will have enough to buy some stuff for "free" each update (but absolutely not all, will have to be super picky on what buy)
As a whole a shit greedy system, but that's the situation
Of course you can stick to only free items and buy some with DT, but that way you will have even less items
I suggest at least get the FCoins to buy first monthly Fighting Pass, that way playing them 100% you will get new stuff each month