To enable raytracing in your scene. Select the root node, in its properties under the Raytracing heading, tick the “enabled” checkbox.
You can toggle raytracing using Shift+R or by clicking on the enable raytracing button in the GUI.
|The new enable raytracing button in the GUI.|
If raytracing nodes are hatched out in red, it means that raytracing is disabled on the root.
We don’t recommend using the root antialiasing as it tends to make raytracing slower.
For more efficient antialiasing use the Temporal and FXAA antialias nodes.