(February 11, 2008) Boomer Labs and Ziv Qual are pleased to announce the release of "Occlussion Pass Generator (OPG)" - a freeware plugin for 3ds MAX.
OPG is a freeware utility for Max that allows you to create occlusion passes with the click of a button. The plug in will allow you to control all the relevant parameters and even keep bump / opacity / displacement maps in the calculations.
What is an occlusion pass?
To simplify the explanation, just think of a situation when all your objects have a simple white color and your scene is lit equally from all directions by a white light. Basically this should result in a blank white image, but what happens when some objects block a certain amount of rays that should have gotten to other objects? Those rays don't reach the other object and as a result, the parts where the rays were blocked will become darker. The more rays blocked, the darker the surface will be. So basically what we get is a white image with dark areas where geometry intersects with itself.
Why using it?
The resulting occlusion pass gives very accurate and smooth shadows that resemble the result of global illumination. Compositing these shadows over your final render can significantly improve your image in many ways; it can mainly improve your shadows, give more depth to your scene and really helps to better show all the details of your models.
When to use it?- After you decide you are finished with your scene and have rendered your image.
- Use this plugin to render out another pass and then composite it over the render.
Further information, including example images and download instructions can be found here:
http://www.boomerlabs.com/Freeware/OPG/
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