Realsoft 3D includes powerful tools for performing post-processing effects on rendered images. The dynamic architecture of the rendering system makes it possible for the rendering engine to output, or make available, any data it computes during the rendering stage. In addition to predefined rendering channels such as Color, Alpha, and Transparency, you can create and define any number of custom channels and use the VSL material system to process them. Thus, it is possible to achieve virtually any post processing effect you can imagine.
Tutorial level: Medium
Example project: 'tutorprojects\animation\post images\animatedFog'
The fog post effect uses the depth information from the rendering engine and its own attributes such as fog color, saturation, and minimum and maximum distances to compute a global fog.
You can animate any of the fog attributes. For example, to create an animation where the saturation of the fog drops from 100% to 0%, do the following:
1. Create a fog object in the select window's Post Image Effects tab by selecting New/Fog. Double click on the new object to open the property window.
2. Turn on animation recording.
3. Move the time slider to the last frame and set the Max Saturation field to 0%. Turn off animation recording.
4. You now have two key frames for the Max Saturation attribute. Move the time slider to see how the fog saturation decreases over time.
Modify the Max Saturation attribute in animation recording mode
If you want to see how the fog looks when rendered, create some geometric objects at different distances in a view window. Next, drag & drop the animated fog object from the select window into the view window. Render the view (with Ray Trace rendering) at several different frames along the timeline to see the effect of decreasing fog saturation.