Difference between revisions of "Live 2022.09.04"

Latest revision as of 12:29, 21 October 2022

Solaris Karma MaterialX Surface Shader Blending

Scene File

Summary

This stream covers importing MaterialX files into Solaris, how they can be modified and finally how to mix multiple surface shaders to produce gold flakes embedded in marble.

Reference images of gold flakes embedded in quartz and other rocks.

Example materials that ship with MaterialX and can be found in the Houdini install directory:

$HH/materialx/resources/Materials/Examples/StandardSurface/

Materials downloaded from Ambient CG contain .usd files which can be imported into Solaris using a reference LOP.

The blending of surface shaders is controlled by a spatial noise visualized below, this mask drives the mixing and blending between marble and gold.

Video On Demand

02:35 Importing the MaterialX Shaderball
03:59 MaterialX online viewer
05:51 Importing shaderball geometry from SOP network into Solaris
06:38 Viewing the Solaris scene graph tree
10:10 Using materials from https://ambientcg.com/
23:05 Autodesk Standard Surface Documentation
25:45 Duplicating geometry
28:00 Editing a material MaterialX graph
35:10 Importing the marble material
39:17 Edit material properties LOP
43:30 Editing the marble shading network
53:00 Mixing surface nodes
58:00 Using spatial noise to mix surfaces
1:11:00 usdz files documentation
1:14:00 Wrapping up, stream topics overview

@@ Line 1: / Line 1: @@
 == Solaris Karma MaterialX Surface Shader Blending ==
-[[File:2022_09_02_karma_particle_basics_023c.jpeg | 960px]]
+[[File:Screenshot_at_2022-09-29_11-54-26.png | 960px]]
 == Scene File ==
+Download [[:File:2022_09_04_mtlx_usd_004.hiplc|mtlx_usd_004.hiplc]]
+== Summary ==
+This stream covers importing MaterialX files into Solaris, how they can be modified and finally how to mix multiple surface shaders to produce gold flakes embedded in marble.
+Reference images of gold flakes embedded in quartz and other rocks.
+[[File:Screen_Shot_2022-10-20_at_7.13.22_PM.png | 960px]]
-Download [[:File:2022_09_02_karma_particle_basics.hiplc|2022_09_02_karma_particle_basics.hiplc]]
-== Summary ==
+Example materials that ship with MaterialX and can be found in the Houdini install directory:
-To quickly produce a nice looking particle cloud shape, I move points through a noise function.  This can be done iteratively, in a for-loop to create detailed wisps.  You can also experiment with settings such as roughness or frequency and see the results quickly.  This is a nice alternative to simulating particles which can be more time consuming process involving caching many frames to memory or disk.  Below is an animation showing the evolution of the particle form as various noise settings are adjusted.
+$HH/materialx/resources/Materials/Examples/StandardSurface/
+[[File:mtlxstandard_surface_examples.jpeg | 960px]]
+Materials downloaded from [https://ambientcg.com/list Ambient CG] contain .usd files which can be imported into Solaris using a reference LOP.
-[[File:2022_09_02_particles_moved_through_noise.gif | 960px]]
-[[File:2022_09_02_particles_turntable.gif | 960px]]
+The blending of surface shaders is controlled by a spatial noise visualized below, this mask drives the mixing and blending between marble and gold.
+[[File:Screenshot_at_2022-10-21_13-12-23.png | 960px]]
+[[File:Screenshot_at_2022-10-21_13-09-08.png | 960px]]
-== Shader Details ==
-The final shader uses the standard surface with diffuse, specular, SSS, thin-walled and opacity.
-The colors are also controlled in the shader.  We start with the color attribute, which is the relative bounding box position of the particles before they're shifted through the noise in this case.  This attribute is then fed through a noise function and finally a ramp.  This allows for quick adjustments to be made all in the shader manipulating distribution of the final color output.  This color output is used to drive the diffuse and SSS components of the surface shader.  This gives a nice semi-translucent look to the particles.
+<!--
+https://autodesk.github.io/standard-surface/
-[[File:Screenshot_at_2022-10-05_12-32-31.png | 960px]]
+https://www.sidefx.com/docs/houdini/nodes/vop/mtlxstandard_surface.html
+-->
 == Video On Demand ==
@@ Line 24: / Line 36: @@
 * 02:35 Importing the MaterialX Shaderball
-* 03:59 MaterialX online viewer
+* 03:59 MaterialX [https://academysoftwarefoundation.github.io/MaterialX/ online viewer]
-* 05:51 Importing the shaderball into Solaris
+* 05:51 Importing shaderball geometry from SOP network into Solaris
-* 06:38 Viewing the Solaris scene graph tree
+* 06:38 Viewing the [https://www.sidefx.com/docs/houdini/ref/panes/scenegraphtree.html Solaris scene graph tree]
 * 10:10 Using materials from https://ambientcg.com/
-* 23:05 Autodesk Standard Surface Documentation
+* 23:05 Autodesk Standard Surface [https://autodesk.github.io/standard-surface/ Documentation]
 * 25:45 Duplicating geometry
 * 28:00 Editing a material MaterialX graph
@@ Line 36: / Line 48: @@
 * 53:00 Mixing surface nodes
 * 58:00 Using spatial noise to mix surfaces
-* 1:11:00 usdz files
+* 1:11:00 usdz files [https://graphics.pixar.com/usd/release/spec_usdz.html documentation]
 * 1:14:00 Wrapping up, stream topics overview
-== Additional Images ==
-[[File:2022_09_02_karma_particle_basics_018.jpeg | 960px ]]
-[[File:2022_09_02_karma_particle_basics_016.jpeg | 960px ]]
-[[File:2022_09_02_karma_particle_basics_024.jpeg | 960px ]]
-<!--
-[[File:2022_09_02_karma_particle_basics_014.jpeg | 960px ]]
--->