Implement improved PS2 brushwork

[MaestroFenix]

The PS2 version of HL1 had not only fixes, but also it has reworked rooms and added extra detail. All the changes that weren't done due to the ( horrible PS2 ) performance ( like moving away the lounge in Office Complex ) should be recreated, especially the new start of Hazardous Course.

Note: Some maps already have implemented some fixes / brushwork / textures like in PS2, but these were done as their original issues were too big to ignore.

• [ ] Hazardous Course
• [x] Welcome To Black Mesa
• [ ] Anomalous Materials
• [ ] Unforeseen Consequences
• [ ] Office Complex
• [ ] We Got Hostiles
• [ ] Blast Pit
• [ ] Power Up
• [ ] On A Rail
• [ ] Apprehension
• [ ] Residue Processing
• [ ] Questionable Ethics
• [ ] Surface Tension
• [ ] Forget About Freeman
• [ ] Lambda Core
• [ ] Xen
• [ ] Gonarch's Lair
• [ ] Interloper
• [ ] Nihilanth
• [ ] Endgame

[MaestroFenix]

The fused Blast Pit map has now almost all the unique PS2 areas, but I'm not going to mark it as complete until I have the time to examine each part carefully.

Due to me being busy with other projects, this ticket might be dropped from V3, and relegated to a posterior release.