I try the demo version of gstudio A7 and, open the project sample about shader.
I replace the model with this (doom3 enemy model).
And...
this is the Results....

this picture without shaders



this is with shaders implemented



GREAAATTT.....

and look at the frame rates, still running FAST...

Note: this model is property of Id software (DOOM3), I use this for testing purpose only.