it's an arcade shmup that I saw once and forgot the name.
It's polygons, a raystorm view, but at a slightly greater tilt, or maybe looking pretty far into the screen actually, but still overhead, and I remember flying through a canyon or between a gully of clouds or something and blasting enemies like spacey sail ships. I remember I'd never seen it before and haven't since. The quality seemed about ZN-1 or maybe a little better?