Just to be clear, the catalog image was taken in a white room, not a black one. That's the gate effect using a combination of the sgPortal and sgDark2 triggers.

A pitch black shadow portal of impressive size. Works pretty much the same as other gates, but is considerably darker. Works with both male and female avatars.

Triggers:

• sgDark1: Surrounds a large area around the user with a wall of darkness. Wears off after a moment.
• sgDark2: Same as sgDark1, but permanent (until you move your avatar to a node with a different pose than the node you're already in, or until you take this product off).
• sgPortal: Creates a large permanent portal on the floor beneath the user.
• sgRise1: The user disappears to deep beneath the floor, and a large shadow portal expands outward along the floor over the user. The user then quickly rises through the portal.
• sgRise2: Same as sgRise1, but the user rises slowly.
• sgSink: Same as sgRise1, but the user does not disappear at the start and sinks into the portal instead of rising from it.

Be sure to try before you buy. As always, reviews are appreciated.