Exit Portal

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== == Explanation An "Exit Portal" describes penetrate an opening in a virtual space (eg a window) by the light can. Since light is usually calculated in all directions, this can result in longer rendering times. Since one room, but penetrate only through certain openings light link building can be defined by these portals. Thus the white light where it can penetrate into the room and proposal software where no light emission is required. Thus serve "Exit portals" as a rendering accelerator.

Application

"Exit portals" are used in finalRender Stage, Maxwell Render and possibly other rendering engines. A portal should be defined by a polygon object, which seals the opening of space completely, while one always make sure as little as possible to use polygons for loan modification that object. It should be ensured that between "exit portal" and the space is not a gap, so you can push something into the portal into the space object. A gap would make the portal unnecessary because the ambient light would be calculated as usual, since it through the gap in the Space can penetrate. The portal objects must be defined in the application, but this is from software to software Rhino Deck different.

Notes

"Exit Portal" can be used in conjunction with ambient light and sunlight. No gaps between the portal and can object. Inquire whether the normal direction is in the rendering engine of importance. Portals can cover multiple openings, if they lie close together, eg A window with the window frame. Scenes can have multiple portals