Live 2022.09.02: Difference between revisions

Revision as of 08:57, 5 October 2022

Rendering Particles with Solaris, Karma and MaterialX

Scene File

Download the Houdini file: 2022_08_23_materialx_USD_008.hiplc

Summary

Building a shader from scratch in Solaris with MaterialX. The color values are retrieved from the geometry "Cd" attribute and the displacement pattern is generated using MaterialX math nodes to remap the surface position to a waffle grid-like bumpy pattern.

Below is the MaterialX shading network.

Video On Demand

0:02:00 Setting things up
0:10:05 Building procedural particles using for each feedback loop
0:21:30 Bringing particles into the Stage/Solaris context
0:28:00 Adding MaterialX shader
0:35:12 Looking at PBR SSS on particles
0:39:16 Bringing in particle color to the shader
0:40:55 Remapping attributes using color ramp
0:59:30 Using opacity for a softer shading look
1:20:20 Importing Flip fluid particle cache to test with Karma
1:35:13 Wrapping up

@@ Line 30: / Line 30: @@
-During the live stream, I didn't connect the height to normal node properly which was causing the shading artifacts.  To fix this, you can add a normal map node in between the shader connection like so.
-[[File:Screenshot_at_2022-09-09_14-39-32.png | 900px]]
-== Links ==
-You can read more about using [https://github.com/AcademySoftwareFoundation/MaterialX#readme MaterialX] in Karma and Solaris [https://www.sidefx.com/docs/houdini/solaris/materialx.html here].
-The [https://www.sidefx.com/docs/houdini/nodes/vop/mtlxstandard_surface.html MtlX Standard Surface] node is based off of the [https://autodesk.github.io/standard-surface/ Autodesk Standard Surface]
-For more details, see the [https://materialx.org/assets/MaterialX.v1.38.Spec.pdf MaterialX specification] on the nodes, functionality and capabilities.
 == Additional Images ==