To make an object disappear from reflections in Blender, you can modify its visibility settings or use compositing techniques.
The primary method involves adjusting the object's visibility specifically for glossy rays (reflections).
Disabling Glossy Visibility
According to the reference, you can effectively remove an object from all reflections by disabling its glossy visibility.
How it Works:
- This setting controls whether rendering rays designated for glossy reflections "see" and interact with the object.
- When you disable an object's glossy visibility, that specific object will no longer appear in any reflections rendered in your scene.
Effect:
- The object itself remains visible in the render, but it simply won't show up in reflective surfaces like mirrors or glossy materials.
Removing an Object from Specific Reflections
If your goal is to make an object disappear from only one particular reflection while remaining visible in others, the reference indicates that compositing is the only way to achieve this.
How it Works (General Concept):
- Compositing involves rendering different layers or passes of your scene separately (e.g., one render with the object, one without) and then combining them in Blender's compositor or external software.
- This allows you to selectively mask out or remove the object from the specific reflection pass before combining it with the rest of the image.
Considerations:
- This method offers granular control but is more complex than simply disabling glossy visibility.
- It requires setting up render layers and working within the compositor node tree.
In summary, for an object to disappear from all reflections, disable its glossy visibility. For it to disappear from only specific reflections, you will need to use compositing.
