Rice, at least for me, 16BPP will cause vertical line patterned textures to appear.
I have found out that the vertical line patterned textures are being caused by 16BPP.
This is for people who want 16BPP instead of 32BPP, because the sad news is
that with Radeon video cards lesser than a Radeon 9500 video card, 16BPP probably is faster than 32BPP, or any video card that don't have the fastest 32BPP 3D rendering.
Solution: Don't use 16BPP, always use 32BPP.
BTW, this problem is with Catalyst 3.7 and Windows 98 SE. I don't know if any Catalyst driver will help any, because I gotten wording that later Catalyst versions aren't always better.