Horse Base Coat Texture is completely black with Ray Tracing on

The Horses base coat texture now renders as completely black with Ray Tracing on, while the spots remain visible.

Steps to Reproduce:

1. Enter a world with Ray Tracing on
2. Summon or find a horse

Observed Results:

The Horse's base coat texture renders as completely black only when Ray Tracing is activated.

Expected Results:

The entire Horse texture should render correctly as it did before, as it is with Ray Tracing off.