This paper proposes a new rejection test for accelerating ray/triangle mesh intersection. In the approach, a ray is defined as the intersection of two nonparallel planes. For a given ray and a complex scene including dense triangle meshes, this approach can cull most nonintersecting triangles by a simple rejection test that only involves triangle/plane intersection tests. With this approach, exploiting image-space coherences for primary rays in ray tracing is straightforward. In order to exploit object-space coherences, the approach can also be combined with popular spatial partition schemes, e.g. bounding box hierarchies and octrees. Furthermore, this approach can be easily extended to more general polygonal meshes.