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The hide flags are explained in more detail in this section of the main Maxwell manual.
These attributes do not exist until you set them to a non-default value, to prevent cluttering up the scene. As a side effect, the UI controls don't behave like regular Attribute Editor controls, so it's not possible to right click them to set keys, create layer overrides etc. However, once they are set to a non-default value, they also show up in the Extra Attributes rollup, where the controls behave as expected. This mechanism is also used for the camera parameters and you can read more about it in the corresponding section of the manual.
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When Specify Object ID Color is off, the color used in the Object ID pass is in fact generated based on the name of the object. This way, objects will keep their colors between different frames of an animation. If truly random colors were used, objects would change color between frames, making selection very difficult. |
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