Irrlicht Engine

I think to fully customize Irrlicht GUI will take you lots of time and not designer-friendly.

Check for pointers, it often invokes methods with empty pointer. Be careful.

The first question seems like what I posted in another thread:
http://irrlicht.sourceforge.net/forum/viewtopic.php?f=4&t=49330
I've resolved in this way: the problem is when drawing 3D line as a scene node, you probably forget to set material, or set material count to zero. This is not the correct ...

If I were not mistaken, let the room node have the material not to be lightened, like this:

The .irr format does not support proper texture settings upon load, which means that some artifacts can show up.
For render order, you probably have to render in two sections. First scene and then on-top models
Could you help me troubleshoot the problem using my code?
I used to believe that ...

I am learning Irrlicht and wants to build a scene and an axis. If possible, you can download the source files and help me troubleshoot the program.
Here is two problems about it:
1. I've make an axis as my custom node, however, when I rotate the camera, the axis is hidden bihind the mesh. It seems ...

Try to fix like this:
Add "update();" after "drawIrrlichtScene();" in paintEvent().

Although I am a beginner for Irrlicht, I think you need a sphere interpolation solution.

Here is a code snippet showing something I guess you want.
http://www.qtcn.org/bbs/read-htm-tid-54915-page-e.html