Half-Life 2: Episode 2 Forum

Certain surfaces and models are invisible such as the inside of a strider and fast zombies (it looks like a floating headcrab).

YES!! I experienced the same thing! the fast zombies just float along at a terrifying speed towards you. I also found that some fences do not show up, thus making some of the puzzles or finding my way impossible. Also, some wierd lighting some times, usually near water. purple, green and red lights instead of regular fluorescent white and stuff. wieeerrrrrdd. most annoying would be the fence being invisible. THe lights are wierd but kinda cool enough not to bother me. Also, the floating fast zombies are just frustrating.

Humm... This could be related to the alpha test failure, the fences at least. Are you using Nvidia cards?

Ya I'm using a nvidia card 7600 GT baby!

The nvidia mac driver shows sporadic alpha test failures, especially visible on the fences. We've seen this on our mac pro with a 7300, but unfortunately we weren't able to isolate it.

I have this exact same problem: invisible fast zombies/inside of striders. I have a Macbook Pro 2.4 GHz Dual Core with:

Chipset Model: GeForce 8600M GT
Type: Display
Bus: PCIe
PCIe Lane Width: x16
VRAM (Total): 256 MB
Vendor: NVIDIA (0x10de)
Device ID: 0x0407
Revision ID: 0x00a1
ROM Revision: 3212
Displays:
Color LCD:
Display Type: LCD
Resolution: 1440 x 900
Depth: 32-bit Color
Built-In: Yes
Core Image: Hardware Accelerated
Main Display: Yes
Mirror: Off
Online: Yes
Quartz Extreme: Supported
Display Connector:
Status: No display connected

Just thought I'd add another card to the list.

Im not getting invisible textures. But I am getting black textures on some things that are meant to be transparent. Like chain link fences and some times parts of the sky. As for everything els, seems to be running fine.
Im on an iMac 1.83 GHz Core Duo, 2 GB RAM with an ATI Radeon X1600 graphics card.