Some of the doorways are hidden from view (though if you click on the other side of the wall your character will find the path there), but you should be able to make out all the walls and other features in the dungeons.
I used to have a monitor with a slightly curved screen that took all of a minute to setup when I first got it. There was very little glare from ambient light, which was only really noticeable with the monitor off. When it died (a couple months out of warranty), I got a newer and 'better' monitor, which was brighter and had a flat screen. Flat screens are much more susceptible to glare. Bright screens cause eye strain, unless the background light is also bright, which causes glare which causes eye strain.
Anyway, I had to play with the monitor and the lighting in the room quite a bit to minimize (but not eliminate) these problems. With the monitor contrast low enough not to cause much eyestrain in Windows, the BIOS screen is barely visible when starting the computer, and games are much, much darker than they were on my old monitor.
Moving right along, if you right click on an open area of your desktop and select Properties, then switch to the Settings tab and click the Advanced button (may be different in XP) and poke around a bit, you should be able to find an option to change the gamma / brightness / contrast just in games. With an ATI card and Windows 98, in the Advanced Settings of the Display Properties, there is a Color tab, where you can separately make changes to the desktop or 'Full Screen 3D' applications; there are less options for 3D, but I could bump my gamma up to 2 and boost brightness and contrast 20% to be able to see in games that do not have gamma / brightness controls (or where they were insufficient). Of course having the screen bright enough to see in games causes eye strain if I play for very long.
Anyway, at least in theory, if certain things happen I hope to be getting a laptop in the not too distant future....