I wanted to add my experience with Substance Painter 1.0, as I had the chance to use it on 3 different computer.
Two of these are mine:
- a laptop with an i7-2670QM, 12 GB of ram, and nVidia 550M 3GB.
- my new desktop: i7 5930k, 16GB ddr4, nVidia gtx 980.
The third computer in the list is the one I use at work, as I convinced my bosses to buy some licenses of the pro suite.
- I don't remember the specs exactly, but it should have 8GB ram and one nVidia gtx 670 2GB.
Now, sadly I have to say that painting in 4K is slow even on my desktop, which I believe has quite high specs. But it looks to work OK in 2K.
On both my laptop and my work configuration instead, not only it is impossible to work in 4K, but working in 2K may be very very slow. Even the Cymourai scene, that has only fill layers and masks, it's quite demanding.
I know that eventually all the lag will be fixed in the next update (which I hope will be out very soon), but I can't stress enough about how important is to deliver better performances: my work configuration for example may not be last gen, but I assure you guys that in a studio that has to maintain several computers, it's not that uncommon to have lower specs than a gamer can have at home.
Thanks!