Graphics Reference
In-Depth Information
14. In the Node Editor toolbar, enable
fake user
for the
Bubbles
material, and click on
the X icon button to delink the datablock. Then click on the New button.
15. Delete the Diffuse BSDF shader node and add a Volume Absorption node (press
Shift
+
A
and navigate to Shader | Volume Absorption). Then connect it to the
Volume input socket of the Material Output node.
16. To make a comparison with the Volume Scatter node, raise the Density value of the
Volume Absorption node to
10.000
and set the Color values for R to
1.000
, G to
0.000
, and B to
0.000
. Have a look at the following screenshot:
Different effects of the Volume Absorption node
17. Add a Texture Coordinate node (press
Shift
+
A
and navigate to Input | Texture
Coordinate), a Voronoi Texture node (press
Shift
+
A
and navigate to Texture |
Voronoi Texture), two Math nodes (press
Shift
+
A
and navigate to Converter |
Math), and a Glass BSDF shader (press
Shift
+
A
and navigate to Shader |
Glass BSDF).
18. Connect the Object output of the Texture Coordinate node to the Vector input socket
of the Voronoi Texture node, and the Fac output of this node to the first Value input
socket of the first Math node. Set the second Value to
0.100
, set Operation to Less
Than, and connect its output to the first Value input socket of the second Math node.
Set the second Value to
12.800
and the Operation to Multiply.
19. Connect the output of this Multiply-Math node to the Density input socket of the
Volume Absorption node, and rename the material as
algae
. Here is a screenshot
for your reference:
