Irrlicht Engine

Very nice - again! Also loved the momory cube. What I was really puzzled about was the "controller". Maybe it would help people like me if there were arrows on all four sides of the cross. But otherwise really nice design, good graphics, cool gameplay implementation.

Thanks for mentioning, both create*loaders are now under the same define.

Still, your mesh could have more than one meshbuffer. For example if you have more than 65k polys and a loader supporting this. Or if your mesh type (and obj does) support groups. These are usually kept in Irrlicht as well, as they might be intended for further use. Say, if you store multiple parts ...

Yeah, so first line (even no error here) indicates quite obviously that you access an uninitialized NULL pointer. Which you should never do.

In case they are stored differently in a mesh file they are converted by the loader.

Maybe you just have some standard z-fighting occuring? This problem has been so vague that we cannot say anything about whether there even was a real problem inside Irrlicht or not.

Well, actually this looks like a crash inside the driver. This might happen due to some severely wrong setup of your mesh, yes, but it's quite unlikely. Maybe it's more a problem of using a 32bit driver under 64bit Windows?!

You need to recompile Irrlicht as static, there's a dedicated build target for that. Then you need to define the IRR_STATIC also when compiling your code (esp. when linking). The Irrlicht.a file will fully dissolve into your executable then. Dev-C++ is unsupported, though, so you may have to copy ov...

Maybe try to drop buf only at the end of the insertion. Also try to debug which things are actually crashing.

Integration of other GUI frameworks like CEGUI (GUI only) or QT (can also integrate other things, not only GUI) are explained either with the toolkits or in several examples on the forum and/or the wiki.

drawAll without beginScene and endScene could be problematic. 2d Material does not affect drawAll calls, which are all 3d (at least from setup point of view). 1.7.x is quite outdated and hard to assess which things have been fixed already.

So how do you render the textures, and are you sure that it's AA and not just bilinear filters? For 2D drawing, you could disable AA with the 2d override material, in case it is enabled by default.

What's wrong with the GUI editor of Irrlicht?

Well, two problems here with your "discussion", and why it probably got no answers from someone else. First is that you speculate about "extensions", which are absolutely not required or used in the engine, so even the first post was quite problematic to understand where you want...

But most platforms do not support the proper transparent window creation, IIRC. It is only used to choose a screen mode with 32bit pixels.