Reference > Nodes / Layers > Miscellaneous > OpenGL Bypass

OpenGL Bypass Node

The OpenGL Bypass node can be used to define what is displayed in the OpenGL preview of the Camera view separately from what appears in the final rendered image. This can be used to help with performance when working on a scene or during playback. The OpenGL preview can be made to only display elements that are important to the animator as they are working on the scene, making the generation of the OpenGL preview a lot less demanding for Harmony, without affecting the rendered image.


The OpenGL Bypass node has two input ports and one output port. What is connected to the left input port displays in the OpenGL preview, and what is connected to the right input port appears in the rendered image.

In the following example the scene includes a background, a character (which is rigged to be cut by part of the background), a drop shadow, light and shadow effects, a node system deformed by a Quadmap to make a computer or television screen effect, a snowstorm particle system and an overlay. All of these elements are connected to a composite that is connected to the right port of the OpenGL Bypass. Connected to the left port of the OpenGL Bypass is a composite that is only connected to the character without the cutter, the background, and the content of the screen without the Quadmap deformation, which would typically be all the animator needs to work on the scene.

NOTE: This example showcases the OpenGL Bypass node being used for the scene's main composite. It is also possible to use it for very precise areas of a node system, such as individual body parts of a character, as long as they are linked together by a composite.


Parameter Description
Name Use this field to rename the node.