: Luckily for you, there are some free options but you need to understand that achieving the specific look you are looking is a matter of actually working on that look. First, the 3D model

Luckily for you, there are some free options but you need to understand that achieving the specific look you are looking is a matter of actually working on that look.

First, the 3D model of the head

For PC there are a couple of options.
www.daz3d.com/ it is a big application but you have some basic male and female full bodies that you can tweak a bit, and export to another application.
www.makehuman.org/ it is another application where you export the 3D model
www.manuelbastioni.com/manuellab.php This should work on PC, MAC, and Linux because blender works on all platforms.

Step 2, the look

You need a rendering program to choose a type of lighting, and position of these lights, selecting the material, etc.

Daz itself can be modified a bit to generate some different looks, but it is a bit limited.

Blender is a much robust option. So you export the model from either of the 3 initial options and render it inside Blender.

Here you have a problem as I think you do not have a specific look. The first example you posted is simply a clay render with diffuse light. The second could be a backlight or a Fresnel render with no casting shadows. Both depend on the light and materials.

Adding efects

You then the export your final render to Photoshop and add the sparks and leafs, etc.