#2 Support shader that can take values from the node

[Gilles Scokart]

It would be nice to have the possibility to customize the shader so that the color depends on some values of the node.

The would requires to have nodes that may have additional values (for instance a color or any other number from which we could derive a color) and give this node (on top of the level) every time that the shader is queried.

Additionaly, the shader should have the possibility to customize the label sizes (or other attributes).