Result Preview
Of course, you don’t need to work blindly. You can have a preview image that shows you real-time updates of what you’re doing in the Node Editor. To enable a preview, you need to create a Viewer node. The Viewer node is inside the Output nodes group. Add it to your workspace and connect the output of the node you want to preview to the input of the Viewer node. The Viewer node will display a preview of the result of all the nodes in the node tree that affect the node you connected to the Viewer node.
An even faster way to enable a preview is to press Shift + Ctrl + LMB click the node you want to preview. This will automatically create a Viewer node and connect it to that specific node. Pressing Shift + Ctrl + LMB click in any other ...
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