Hi

I have been using 3.3.2 for a while and tried to install Beta 4.0 (11.12.2018 edition) today just for fun. I experienced a lot of lag with my intous 2 Wacom pen. And it was also a funny feeling drawing, because it felt like Krita did not recognize the movements right. Besides from the lag and delay of drawing it also had some issues with the proportions (the mapping) ...it felt like the it did not really work well and smooth. I tried changing the settings and shift between Direct 3 and Open GL with same result.
So finally I downgraded to 3.3.3 and it works much better.
I don´t know if you can use this info for anything, but I thought I´d just let you know.
Thx for all the great development of this awesome software!

Best regards
Morten Telling
Denmark

Are you sure you didn't enable the stabilizer? There's pretty much no difference in the tablet code between 4.0 and 3.0...

What OS are you on? Windows, Linux? If on linux...are you using the appimage?

Must be windows, because of the mention of direct3d