Does this game actually require 8GB of VRAM for good settings?

[Deoxys]

I'm thinking of buying the game soon, but my current computer, although good, only has 3 GB of VRAM. I know this is not enough, so I'm looking to upgrade to a Nvidia 1660, which has 6 GB of VRAM. However, 6 =/= 8, but I cannot afford a graphics card that has 8 GB of VRAM. Do you guys think the 6 will be enough? I know I may not be able to run the game on the highest settings but I'd also prefer not to be on the lowest.
General specs:
Intel i7
Quad core, 16 GB RAM
Nvidia 1060 3GB VRAM (To be: Nvidia 1660 6GB VRAM)

I also don't want to have to run the game at like 20 or 30 fps just for a decent look. Honestly, I think even after the upgrade, the computer won't hold up, but I'd like to double check here.

[TheTycoon]

After my RX580 8 gb crapped out on me about a month ago, I replaced it with the Nvidia 1660 6 gb. My game runs on mostly medium to high setting just fine.

Well except for the staff stuck on paths bug and occasional crash still....

[Oz Gaming]

I'm using a Nvidia GTX1660ti (6GB) GDDR6 card and the game runs nice and smoothly on High settings.

[Oz Gaming]

GTX1660 (6GB) card is GDDR5

GTX1660ti (6GB) card is GDDR6