In this part of this Blender 3D tutorial, we will describe the nodes configuration in greater details.
In the Nodes Editor, click on Composite Nodes and Use Nodes to activate them.
By default, one input render layer and one output will appear in the Nodes window.
We need to add one additional Render Layer. To do so, go to Add >> Input >> Render Layers (as shown below).
Next we need to set the 2 Input layers to ‘Glows‘ and ‘Base‘ respectively. To do that, click on the up-down button of each Input node (as shown below).
In order to create the glowing effect from the ‘Glows’ render layer input, we need to firstly blur it, followed by brightening the glow intensity.
To do that, firstly, add a Blur filter. To do so, go to Add >> Filter >> Blur. Give values of X and Y greater than zero. The greater the value, the bigger the glow size. As for Blurring mode, my preference is Gaussian (Gauss).
Next, add a RGB Curve using Add >> Color >> RGB Curves. By default, the curve is an angled straight line. As in Photoshop, insert a knot and changing the curve shape will correspondingly change the RGB value. To get a brighter glow, pull the knot upwards.
Now, we need to find a way to integrate the glows onto the rest of the rendering. To do that, add a Mix node using Add >> Color >> Mix. Note: In this node, use the Add mode. Factor set to about 1.oo.
Now, configure and connect the nodes as shown below:
The sequence should be as such:
Connection 1: ‘Glows‘ input render layer connects to Blur filter. Blur filter connects to RGB Curve. RGB Curve connects to the Add mix node.
Connection 2: ‘Base‘ input render layer connects to the lower image input of Add mix node.
Connection 3: Add node connects to Output Composite.
Once all this is done, go to the Scene(F10) Panel. Turn on Do Composite. Click the Render button.
If everything goes well, you should see the nice glows in the final rendering as shown below.
That’s all for this Blender 3D tutorial. Thanks for reading 🙂