This code creates empty images (everything is transparent, there is no model)
megaglest_g3dviewer --load-unit=scenarios\0_battleglest\battleglest\factions\%%i\units\%%i,stop_skill,attack_skill --load-model-animation-value=0.5 --load-particle-loop-value=8 --zoom-value=1.22 --rotate-x-value=-39 --rotate-y-value=21 --auto-screenshot=disable_grid,saveas-scenarios/0_battleglest/grafiks/avatars/%n%.png
without the --auto-screenshot the image is correctly loaded in g3dviewer.
System is Windows Vista 32bit, SVN-Head 3035