White Christmas

One of the fun things about Powermonger was that the weather changed throughout the game. Green grass gave way to autumn ochre and then onto the snowy white of winter.

Seems a simple enough affair of using glTexSubImage() to replace bits of the current terrain texture with pixels from the next season's texture (from our Paris collection...).

Only 2 problems:
1. This has to be done not just for the original texture but also the mipmaps as well.
2. You can see a pattern emerging as the same alterations are used across each tile. I may use a large terrain texture and stretch it across several tiles at a time to solve this.

Anyway, even with a couple of minutes coding, I'm getting rather nostalgic about it. :d