I really like the look of newton, but I am already able to use it with A7, thanks to ventilator. Newton is most probably slower than PhysX and has less features. I really like the features of PhysX and thus voted for it. The most important difference I see between Bullet and PhysX is the work NVIDIA puts into PhysX.

Bullet gets funded by Sony Computer Entertainment. They hired Erwin Coumans (a former Havok employee) to work full time on it.

If Gamestudio has PhysX built-in like currently ODE (directly in the acknex.dll), won´t every project need the driver then no matter if it uses physics or not? That´s unacceptable to me.

I think if you absolutely want to use PhysX then the dual physics engine solution like Fastlane69 mentioned would be best. Replace ODE with Bullet in all editions and offer PhysX for the professional edition as an add-on. There already are physics engine abstractions layers out there so maybe this wouldn´t be that much work. It also would be one more good incentive for the professional edition again (at least for people slavishly following marketing hype :p).

I don't really understand why the driver would be an issue though. It would be a very small install compared to a regular project size, and it could be included in your install process. Perhaps Conitec could also make it so that if you are not using the physics engine, you can set a certain define and you won't need the drivers at all.

not everyone wants to do big games. there also are small casual games, visualisations, simulations,... and not everyone wants to distribute their project as an installer. it's about freedom to do it like you want and this driver makes no technical sense at all.

i voted for newton and dislike physx in its current state but somehow i like the multiple engine idea too.

I want whatever physics engine has the least problems with stuff suddenly flinging around inexplicably and bouncing around the level!!! so, the most reliable.; which one is that? It seems like they all do the same thing, but which is most stable and compatible with hardware,and easiest and quickest to work with?

The main problem that people have with PhysX seems to be the huge driver. Just for information - I can guarantee that you won't need the driver when physics is not used in your app.

It is very likely that in the future the PhysX driver is automatically installed, or at least available when you install an nVidia card, and will probably become just as easily available as the DirectX library.

What we certainly won't do is implementing different libraries in the Commercial and the Pro Edition. We will support only one library, and will maintain backwards compatibility to the current physics functions.

if that's the case i will change my vote from bullet to physx.

same.

And I change my vote from Newton 2 to PhysX, too.

same here