Download HD versions (Color & Black / White versions) here
Creation of the girl body with the free open source software MakeHuman ( www.makehuman.org ).
In a second step, I exported the girl's body in an OBJ file to the software 3ds Max for the modeling and rendering.
Utilisation of the NVIDIA Mental Ray render engine for the whole project.
Creation of ivy and root shapes with the free 3ds Max plugin - Ivy generator ( http://www.guruware.at/main/ivy/index.html ).
I played a lot with the settings to generate different kind of shapes in the scene.
Also, I converted the root shapes into ' Edit Poly ' objects to move them correctly around.
Then, I did a rendering for each root for the future postwork in Photoshop ( PNG files with alpha channel).
The final shader is a very basic one, Standard material with a self-illumination + opacity with a gradient ramp (red/ orange) for the main color + Noise bump mapping.
Here I created a very basic Particle emitter with an upward direction in the scene.
Of course, I realized digital painting to add much more details everywhere and surely to add lights, glow effects, depth, textures and the back ground.