Ogre3D Demo alpha material fix

Linux-compatible Ogre3D demonstration utilizing SDL. A glance at the project can be seen [here] https://github.com/netpipe/SDL-LightGun/tree/main/ogre3d

The finishing touches needed involve:
-- fix material system for overlay to display the sinden boarder around the screen.

was thinking we could do this for 50 dollars CAD

Ideal Skills:
- Proficiency in coding with Ogre3D.
- Excellent knowledge of SDL.
- Extensive Linux compatibility experience.
- Past experience with 3D rendering.
- Ability to code interactive user inputs.
- CodeBlocks IDE

I look forward to hearing from all