masking and performance

ok i’m making a 3d space game, I added a cockpit picture to be drawn on top of the background, i used masking with blending,but i realized it significantly lowers fps rate.

any alternate ideas on how to render a cockpit on top of the background scene?

game could be downloaded here:
controls :wsad ,arrow keys, Esc button

What is your video card ?
If it is limited in fillrate, a full screen blended quad can indeed reduce performance.
What time per frame do you spend, before and after the cockpit ?

Using alpha testing + blending can make faster the completely transparent parts.
Or use opaque textured polygons without blending.

yep loading a transparent .tga file as my texture and alpha testing did the job
thank you