If I understand correctly, yes! You can change the default .jpg script to .png simply to allow for transparency. Here's an example:
material preset_#bodyMatR
{
technique
{
pass
{
texture_unit
{
texture preset_8body2.jpg
}
}
}
}
To...
material preset_#_bodyMatR
{
technique
{
pass
{
texture_unit
{
texture preset_8body2.png
}
}
}
}
As for the transparency to actually appear, you'll need a completely new script for that. Here's part of it from one of my .material files. Whatever is marked red, you'll want to change to match what body part and number your preset is for it to function.
material preset_#_bodyMatR
{
receive_shadows on
technique
{
pass
{
ambient 1.000000 1.000000 1.000000 1.000000
diffuse 1.000000 1.000000 1.000000 1.000000
specular 0.050000 0.050000 0.050000 1.000000 12.500000
emissive 0.000000 0.000000 0.000000 1.000000
cull_hardware none
cull_software none
scene_blend alpha_blend
alpha_rejection greater_equal 128
texture_unit
{
texture preset_#BODY.png
tex_address_mode wrap
filtering trilinear
}
texture preset_#BODY.png
}
}
}
}
Here's a great tutorial by Feareh that is very helpful when it comes to transparent presets. http://www.feral-heart.com/index.php?option=com_jfusion&Itemid=2&jfile=index.php&topic=34786.0 (http://www.feral-heart.com/index.php?option=com_jfusion&Itemid=2&jfile=index.php&topic=34786.0)