How does the welcomeAboard library node work?

[woosh]

There are two things about the welcomeAboard panel in the library that I don't get:
1) When viewport shading (Method to display/shade objects in the 3d view) is set to Solid, it shows textures! How come? Normally, everything is just shades of grey and textures only show when you switch it to Texture.

2) It has a surface inside that says "Welcome aboard" on  a black background. But! The texture is actually transparent and I can't figure out where the black is coming from! I even deleted that surface, made a new Plane object, textured it with my own text with a transparent background and put it in front of the panel. My text had a transparent background. But as soon as I joined the two objects (the panel and my new plane with some text on it), the transparent part of the text texture turned black!

Could anyone plz explain to me what's going on? (Blender 2.79b).

[Sven]

In Blender 2.79 you have the option to enable textured solid, in the viewport shading panel
   

For the black in the transparent texture: it's simply because the mesh has a material applied (which changes nothing for the export) it makes the transparent parts black. You can either remove the material, or enable transparency to make the transparent parts appear transparent.

[woosh]

In Blender 2.79 you have the option to enable textured solid, in the viewport shading panel


For the black in the transparent texture: it's simply because the mesh has a material applied (which changes nothing for the export) it makes the transparent parts black. You can either remove the material, or enable transparency to make the transparent parts appear transparent.

Right, I had no idea about any of that! Thank you!