Do a couple tests on those old machines to make sure they can at least cope with some of the things you want to incorporate.
If you'll be using lightmaps ontop of your normal textures, you want to be sure those old gfx boards support multiple textures (and still run at reasonable fps).
Quite possibly resolution would play a huge part in this context. You might be forced to use lower resolutions (640x480?) in order to keep fps and or memory use to a reasonable level. But that's pretty worst-case-scenario.
Same with DDS. I know nothing about it, but is that something hardware has to support or a dx7 thing? If it's hardware related, test it. Same with bump maps.
That's my bottom line basically. TEST to make sure it CAN work on those machines, before you spend a lot of time on coding, only to hit a brick wall and make you look silly in front of your client ;)
good luck,
D.
If you'll be using lightmaps ontop of your normal textures, you want to be sure those old gfx boards support multiple textures (and still run at reasonable fps).
Quite possibly resolution would play a huge part in this context. You might be forced to use lower resolutions (640x480?) in order to keep fps and or memory use to a reasonable level. But that's pretty worst-case-scenario.
Same with DDS. I know nothing about it, but is that something hardware has to support or a dx7 thing? If it's hardware related, test it. Same with bump maps.
That's my bottom line basically. TEST to make sure it CAN work on those machines, before you spend a lot of time on coding, only to hit a brick wall and make you look silly in front of your client ;)
good luck,
D.