How can we Restore OpenGL 2.2 Support in Overgrowth (Pre-Alpha 210)?

[woodburnOG]

Hi everyone,

I'm trying to get Overgrowth running on older hardware that only supports OpenGL 2.2. Before Alpha 210, the game had an OpenGL 2.2 renderer, but newer versions require OpenGL 3.2, making it incompatible with some older systems.

I found older shaders and scripts from before Alpha 210 in this repository: Overgrowth Scripts. However, just swapping these files isn’t enough to restore OpenGL 2.2 support. I also tried:
Changing SDL set attributes for OpenGL major/minor versions
Adjusting GLEW settings
Despite these changes, the game still doesn’t work with the old shaders.

Questions

1. Does anyone have access to the source code from before Alpha 210 that still supported OpenGL 2.2?

2. If not, what additional modifications to source code are needed to fully downgrade the renderer?

Any help or guidance would be greatly appreciated!

Thanks in advance.