2d falloff button gone in 2.82.7 The 2d falloff button for weightpainting pass through seems to be gone in the new update, now there's a button which i found worked the first time i used it but now doesn't called frontface falloff, I am currently trying to weightpaint a mesh that has several layers of mesh beneath it, and manually weightpainting each layer or vertex grouping every layer seems a bit overboard, I've tried using x-ray as well and it still wont pass through, front faces only was also unchecked and checked and did nothing.

https://i.gyazo.com/54cc1f75c99fa6fc907b69ec16304a04.gif
I just had the same problem after downloading this new Blender version.

If you open this Falloff menu, then there is that Falloff Shape. 
Changing it from Sphere to Project work for me.