So I'm currently preparing the shared texture packages and a few other map upgrades. While most of this aims to improve performance, map size and workflow, I just wanted to show you what it does to visual quality. :3
The first screenshot shows the current Parpax Delta 2 Revision D on Unvanquished Alpha 25.
The following screenshot was taken with the same setup, except for the following changes:
r_gamma 1.3 → 1.0.
r_specularScale 1.4 → 1.0.
Parpax has been recompiled with »-gamma 1.45« to compensate for the normalized gamma and is using the compressed textures from the shared texture packages.
I have prepared a post that will guide you through the map upgrade process. I will release it as soon as I got rid of the last batch of issues, ideally shortly after Alpha 26 so that you have one month to complete your wizardry.