Live 2022.09.02 - Revision history

Admin: /* Scene File */

2022-10-05T11:40:11Z

Scene File

← Older revision		Revision as of 11:40, 5 October 2022
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	== Scene File ==		== Scene File ==

	Download ~~the Houdini file:~~ [[:File:2022_09_02_karma_particle_basics.hiplc\|2022_09_02_karma_particle_basics.hiplc]]		Download [[:File:2022_09_02_karma_particle_basics.hiplc\|2022_09_02_karma_particle_basics.hiplc]]

	== Summary ==		== Summary ==

Admin: /* Scene File */

2022-10-05T11:40:01Z

Scene File

← Older revision		Revision as of 11:40, 5 October 2022
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	== Scene File ==		== Scene File ==

	Download the Houdini file: [[:File:~~2022_08_23_materialx_USD_008~~.hiplc\|~~2022_08_23_materialx_USD_008~~.hiplc]]		Download the Houdini file: [[:File:2022_09_02_karma_particle_basics.hiplc\|2022_09_02_karma_particle_basics.hiplc]]

	== Summary ==		== Summary ==

Admin: /* Shader Details */

2022-10-05T11:35:03Z

Shader Details

← Older revision		Revision as of 11:35, 5 October 2022
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	The final shader uses the standard surface with diffuse, specular, SSS, thin-walled and opacity.		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.		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.

	[[File:Screenshot_at_2022-10-05_12-32-31.png \| 960px]]		[[File:Screenshot_at_2022-10-05_12-32-31.png \| 960px]]

Admin: /* Shader Details */

2022-10-05T11:33:18Z

Shader Details

← Older revision		Revision as of 11:33, 5 October 2022
Line 18:		Line 18:
	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.		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.

	[[File:Screenshot_at_2022-10-05_12-30-18.png \| 960px]]		[[File:Screenshot_at_2022-10-05_12-32-31.png \| 960px]]

	== Video On Demand ==		== Video On Demand ==

Admin: /* Shader Details */

2022-10-05T11:31:30Z

Shader Details

← Older revision		Revision as of 11:31, 5 October 2022
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	== Shader Details ==		== Shader Details ==
	The final shader uses the standard surface with diffuse, specular, SSS, thin-~~plate~~ and opacity.		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.		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.

			[[File:Screenshot_at_2022-10-05_12-30-18.png \| 960px]]

	== Video On Demand ==		== Video On Demand ==

Admin at 10:49, 5 October 2022

2022-10-05T10:49:26Z

← Older revision		Revision as of 10:49, 5 October 2022
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	[[File:2022_09_02_particles_turntable.gif \| 960px]]		[[File:2022_09_02_particles_turntable.gif \| 960px]]

			== Shader Details ==
			The final shader uses the standard surface with diffuse, specular, SSS, thin-plate 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.

	== Video On Demand ==		== Video On Demand ==

Admin at 10:42, 5 October 2022

2022-10-05T10:42:37Z

← Older revision		Revision as of 10:42, 5 October 2022
Line 11:		Line 11:
	[[File:2022_09_02_particles_moved_through_noise.gif \| 960px]]		[[File:2022_09_02_particles_moved_through_noise.gif \| 960px]]

	[[~~File:~~File:2022_09_02_particles_turntable.gif \| 960px]]		[[File:2022_09_02_particles_turntable.gif \| 960px]]

	== Video On Demand ==		== Video On Demand ==

Admin at 10:42, 5 October 2022

2022-10-05T10:42:29Z

← Older revision		Revision as of 10:42, 5 October 2022
Line 10:		Line 10:

	[[File:2022_09_02_particles_moved_through_noise.gif \| 960px]]		[[File:2022_09_02_particles_moved_through_noise.gif \| 960px]]

			[[File:File:2022_09_02_particles_turntable.gif \| 960px]]

	== Video On Demand ==		== Video On Demand ==

Admin: /* Summary */

2022-10-05T10:37:31Z

Summary

← Older revision		Revision as of 10:37, 5 October 2022
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	== Summary ==		== Summary ==
			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.
	~~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~~.

	[[File:2022_09_02_particles_moved_through_noise.gif \| 960px]]		[[File:2022_09_02_particles_moved_through_noise.gif \| 960px]]


	== Video On Demand ==		== Video On Demand ==

Admin: /* Rendering Particles with Solaris, Karma and MaterialX */

2022-10-05T10:28:39Z

Rendering Particles with Solaris, Karma and MaterialX

← Older revision		Revision as of 10:28, 5 October 2022
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	== Rendering Particles with Solaris, Karma and MaterialX ==		== Rendering Particles with Solaris, Karma and MaterialX ==
	[[File:2022_09_02_karma_particle_basics_023c.jpeg \| ~~900px~~]]		[[File:2022_09_02_karma_particle_basics_023c.jpeg \| 960px]]

	== Scene File ==		== Scene File ==