If you’ve completed the previous chapter you should have a cube in the Visualizer with a texture applied to it. You should also have a projector aimed at the cube with the cube listed as one of the Included objects.
If you open the View tab of the projector and click on the Open setup window button (or double-click on the projector in the Visualizer) you’ll see a window similar to this:
As you can see, Projector setup window looks like a regular layer. The main difference is that it doesn’t have a starting and ending time but it executes all the time. Therefore it doesn’t have On layer begin and On layer end nodes but has Input and Output nodes instead. Input node outputs unmodified projector view from the Visualizer whereas Output outputs the connected texture to Video output window.
You can see what the projector sees in the Visualizer by selecting the Input node and checking the Preview checkbox in its properties.
In some cases, you won’t have to do anything else. But usually, you will have to do some additional warping and edge blending. You can do that simply by inserting Texture warp and Texture softedge nodes between the Input and Output nodes.
Projector setup window acts as a regular layer so you can insert any other node as well (color correction nodes can be useful in this stage), but let’s, for the purpose of this guide, limit ourselves to these 2 nodes.
If you select Texture warp node you’ll see a Setup button in its properties.
If you click on it, a new window will open where you can set up the number of warp handles and adjust the warping. You can set up the Softedge node in a similar way.
Output the projector
A virtual projector is similar to a video screen in that it appears in the Video output window where you can map its content to one of the physical video outputs on your graphics card.
Let’s open the window by going to Window top menu and clicking on Video output (or by pressing F6). From here on, you can follow the same procedure of mapping the projector contents on the left side to a video output on the right side.