Subsurface Scattering - Revision history

Matt: Italicized captions below images

2020-03-08T02:40:30Z

Italicized captions below images

Matt: Formatting

2020-03-07T01:39:49Z

Formatting

Matt: Updated image sizes to fix max width of 800, 399 for pairs, 266 for triplets

2020-03-07T01:31:03Z

Updated image sizes to fix max width of 800, 399 for pairs, 266 for triplets

KyL at 03:04, 5 March 2020

2020-03-05T03:04:32Z

KyL at 02:58, 5 March 2020

2020-03-05T02:58:22Z

Matt: Added screenshot of Glass Shader Sub-surface tab

2020-03-03T21:36:39Z

Added screenshot of Glass Shader Sub-surface tab

Matt at 12:13, 21 February 2020

2020-02-21T12:13:45Z

Matt at 01:46, 20 February 2020

2020-02-20T01:46:05Z

Matt: Formatting

2020-02-20T00:57:36Z

Formatting

Matt: Formatting

2020-02-20T00:54:57Z

Formatting

@@ Line 9: / Line 9: @@
 [[File:luYu_defaultGrey.jpg|800px]]
-The model we will use as a support for the Look Development series
+'' The model we will use as support for the Look Development series ''
@@ Line 21: / Line 21: @@
 [[File:luYu_defaultGrey_yellowTranslucency.jpg|800px]]
-'''Default shader''' with yellow translucency
+'' '''Default shader''' with yellow translucency ''
@@ Line 30: / Line 30: @@
 [[File:luYu_glass.jpg|800px]]
-'''Glass shader''' (default settings)
+'' '''Glass shader''' (default settings)''
@@ Line 57: / Line 57: @@
 [[File:density.jpg|800px]]
-Here is the same pale red used for the '''Volume colour'''. See how it behaves when increasing the '''Volume density'''.
+'' Here is the same pale red used for the '''Volume colour'''. See how it behaves when increasing the '''Volume density'''. ''
@@ Line 84: / Line 84: @@
 [[File:lightingMethodInPt.jpg|800px]]
-Note how '''Subsurface in all directions''' gives a more natural look as the light bounces inside the object, not only towards its surface.
+'' Note how '''Subsurface in all directions''' gives a more natural look as the light bounces inside the object, not only towards its surface. ''
 <br>
-Light passes more realistically through edges and thin parts of the object, and it may also create deeper shadows where appropriate.
+'' Light passes more realistically through edges and thin parts of the object, and it may also create deeper shadows where appropriate. ''
-−
 Now let’s add some colour: we change the '''Decay tint''' and the '''Volume colour''' to different green values:
@@ Line 94: / Line 94: @@
 [[File:luYu_glass_density5_decay0.2_allDirections_greenDecay.jpg|399px]][[File:luYu_glass_density5_decay0.2_allDirections_greenDecay_greenDensity.jpg|399px]]
-'''Decay tint''' will determine the colour of the material when the light travels through it.
+'' '''Decay tint''' will determine the colour of the material when the light travels through it. ''
 <br>
-'''Volume colour''' will define the colour of the material when the light bounces inside of it.
+'' '''Volume colour''' will define the colour of the material when the light bounces inside of it. ''
@@ Line 104: / Line 104: @@
 [[File:volumeDensityFractal.png|800px]]<br>
 You will have to create a '''Transform input shader''' and change it to '''Use world space'''. This applies the noise in 3D space rather than mapping it onto the UV of the surface.
@@ Line 112: / Line 113: @@
 [[File:3dnoiseAdded.jpg|800px]]<br>
-Here is the difference with the fractal noise applied in the '''Volume density function'''.
+'' Here is the difference with the fractal noise applied in the '''Volume density function'''. ''
 <br>
-Note the areas where the light travels through the material, making some areas less homogeneous.
+'' Note the areas where the light travels through the material, making some areas less homogeneous. ''
@@ Line 131: / Line 132: @@
 [[File:sss_roughness_horizontal.jpg|800px]]
-Note how the teapot handle takes a more “gummy” appearance as the roughness increases.
+'' Note how the teapot handle takes a more “gummy” appearance as the roughness increases. ''
 [[File:luYu_glass_density5_decay0.2_allDirections_greenDecay_greenDensity_densityFractal_6AA_36paths.jpg|800px]]
-Increasing the '''Anti-aliasing''' from 3 to 6 and the '''Max paths per sample''' to 36 gives us a pretty decent image.
+'' Increasing the '''Anti-aliasing''' from 3 to 6 and the '''Max paths per sample''' to 36 gives us a pretty decent image. ''
@@ Line 149: / Line 150: @@
 [[File:evaluateColourFunctionVolumetrically.jpg|800px]]
-In this example, a texture is projected (on the Z axis) onto the object and plugged into the '''Volume colour function'''.
+'' In this example, a texture is projected (on the Z axis) onto the object and plugged into the '''Volume colour function'''. ''
 <br>
-We can clearly see the difference between the two colour evaluations. The first one keeps the texture colour from the surface, while the second one evaluates the texture at points inside the volume.
+'' We can clearly see the difference between the two colour evaluations. The first one keeps the texture colour from the surface, while the second one evaluates the texture at points inside the volume. ''
@@ Line 175: / Line 176: @@
 [[File:clearIce.jpg|266px]][[File:cloudyIce.jpg|266px]][[File:saltyIce.jpg|266px]]
-The '''Decay tint''' is set to a light blue colour and the Lighting method in PT to Subsurface scatter in all directions.
+'' The '''Decay tint''' is set to a light blue colour and the Lighting method in PT to Subsurface scatter in all directions. ''
@@ Line 191: / Line 192: @@
 [[File:frozenShip.jpg|800px]]
-Note how the ship affects the light scattering inside the iceberg.
+'' Note how the ship affects the light scattering inside the iceberg. ''

@@ Line 53: / Line 53: @@
 <br>
 Think of it as the amount of droplets in a cloud or the quantity of air bubbles in ice.
 [[File:density.jpg|800px]]
@@ Line 73: / Line 74: @@
-[[File:allDirections.png]]<br>
+[[File:allDirections.png]]
 '''Lighting method in PT''' (Path Tracer) gives us two subsurface options.<br>
@@ Line 115: / Line 117: @@
-Back to the main tab of the '''Glass shader''',
+Back to the main tab of the '''Glass shader''', we now take a look at the '''Specular roughness'''.
-we now take a look at the '''Specular roughness'''.<br>
 [[File:mainTab.png]]
 The '''Specular roughness''' plays a more subtle, yet essential role to achieve a believable material.
-<br>
 It will simulate the microscopic imperfections on the surface of the object, making it more or less “polished”.
 As this controls specular transmission as well as reflection, it will affect the sharpness of the refractions.

@@ Line 7: / Line 7: @@
-[[File:luYu_defaultGrey.jpg|876px]]
+[[File:luYu_defaultGrey.jpg|800px]]
 The model we will use as a support for the Look Development series
@@ Line 19: / Line 19: @@
-[[File:luYu_defaultGrey_yellowTranslucency.jpg|876px]]
+[[File:luYu_defaultGrey_yellowTranslucency.jpg|800px]]
 '''Default shader''' with yellow translucency
@@ Line 26: / Line 26: @@
 To achieve a proper subsurface look, we will need a '''Glass shader'''  [[File:glassShaderIcon.png|150px]]
-We will also have to change the renderer to '''Path tracer''' [[File:pathTracer.png|400px]]
+We will also have to change the renderer to '''Path tracer''' [[File:pathTracer.png]]
-[[File:luYu_glass.jpg|876px]]
+[[File:luYu_glass.jpg|800px]]
 '''Glass shader''' (default settings)
@@ Line 43: / Line 43: @@
-[[File:decay.jpg|876px]]
+[[File:decay.jpg|800px]]
@@ Line 54: / Line 54: @@
 Think of it as the amount of droplets in a cloud or the quantity of air bubbles in ice.
-[[File:density.jpg|876px]]
+[[File:density.jpg|800px]]
 Here is the same pale red used for the '''Volume colour'''. See how it behaves when increasing the '''Volume density'''.
@@ Line 65: / Line 65: @@
-[[File:decay+density.jpg|876px]]
+[[File:decay+density.jpg|800px]]
@@ Line 73: / Line 73: @@
-[[File:allDirections.png|400px]]<br>
+[[File:allDirections.png]]<br>
 '''Lighting method in PT''' (Path Tracer) gives us two subsurface options.<br>
@@ Line 80: / Line 80: @@
-[[File:lightingMethodInPt.jpg|876px]]
+[[File:lightingMethodInPt.jpg|800px]]
 Note how '''Subsurface in all directions''' gives a more natural look as the light bounces inside the object, not only towards its surface.
@@ Line 90: / Line 90: @@
-[[File:luYu_glass_density5_decay0.2_allDirections_greenDecay.jpg|438px]][[File:luYu_glass_density5_decay0.2_allDirections_greenDecay_greenDensity.jpg|438px]]
+[[File:luYu_glass_density5_decay0.2_allDirections_greenDecay.jpg|399px]][[File:luYu_glass_density5_decay0.2_allDirections_greenDecay_greenDensity.jpg|399px]]
 '''Decay tint''' will determine the colour of the material when the light travels through it.
@@ Line 101: / Line 101: @@
 [[File:luYu_fractalNoise.jpg|430px]]<br>
-[[File:volumeDensityFractal.png|876px]]<br>
+[[File:volumeDensityFractal.png|800px]]<br>
 You will have to create a '''Transform input shader''' and change it to '''Use world space'''. This applies the noise in 3D space rather than mapping it onto the UV of the surface.
@@ Line 108: / Line 108: @@
-[[File:3dnoiseAdded.jpg|876px]]<br>
+[[File:3dnoiseAdded.jpg|800px]]<br>
 Here is the difference with the fractal noise applied in the '''Volume density function'''.
@@ Line 118: / Line 118: @@
 we now take a look at the '''Specular roughness'''.<br>
-[[File:mainTab.png|400px]]
+[[File:mainTab.png]]
 The '''Specular roughness''' plays a more subtle, yet essential role to achieve a believable material.
@@ Line 126: / Line 126: @@
-[[File:sss_roughness_horizontal.jpg|876px]]
+[[File:sss_roughness_horizontal.jpg|800px]]
 Note how the teapot handle takes a more “gummy” appearance as the roughness increases.
-[[File:luYu_glass_density5_decay0.2_allDirections_greenDecay_greenDensity_densityFractal_6AA_36paths.jpg|876px]]
+[[File:luYu_glass_density5_decay0.2_allDirections_greenDecay_greenDensity_densityFractal_6AA_36paths.jpg|800px]]
 Increasing the '''Anti-aliasing''' from 3 to 6 and the '''Max paths per sample''' to 36 gives us a pretty decent image.
@@ Line 144: / Line 144: @@
-[[File:evaluateColourFunctionVolumetrically.jpg|876px]]
+[[File:evaluateColourFunctionVolumetrically.jpg|800px]]
 In this example, a texture is projected (on the Z axis) onto the object and plugged into the '''Volume colour function'''.
@@ Line 154: / Line 154: @@
-[[File:evaluateColourFunctionVolumetrically_texture.jpg|876px]]
+[[File:evaluateColourFunctionVolumetrically_texture.jpg|800px]]
@@ Line 170: / Line 170: @@
-[[File:clearIce.jpg|292px]][[File:cloudyIce.jpg|292px]][[File:saltyIce.jpg|292px]]
+[[File:clearIce.jpg|266px]][[File:cloudyIce.jpg|266px]][[File:saltyIce.jpg|266px]]
 The '''Decay tint''' is set to a light blue colour and the Lighting method in PT to Subsurface scatter in all directions.
@@ Line 186: / Line 186: @@
-[[File:frozenShip.jpg|876px]]
+[[File:frozenShip.jpg|800px]]
 Note how the ship affects the light scattering inside the iceberg.

@@ Line 99: / Line 99: @@
 Here we create a fractal noise and plug it into the '''Volume density function'''.
-[[File:luYu_fractalNoise.jpg|450px]]<br>
+[[File:luYu_fractalNoise.jpg|430px]]<br>
 [[File:volumeDensityFractal.png|876px]]<br>

@@ Line 24: / Line 24: @@
-To achieve a proper subsurface look, we will need a '''Glass shader'''
+To achieve a proper subsurface look, we will need a '''Glass shader'''  [[File:glassShaderIcon.png|150px]]
 [[File:luYu_glass.jpg|876px]]
@@ Line 74: / Line 73: @@
-'''Lighting method in PT''' (Path Tracer) gives us two subsurface options.
+[[File:allDirections.png|400px]]<br>
-'''Subsurface scatter in all directions''' is designed to accurately scatter light inside a closed object.
+'''Lighting method in PT''' (Path Tracer) gives us two subsurface options.<br>
 '''Subsurface scatter toward normal''' is a faster method designed for simple, flat objects, such as water surfaces
@@ Line 99: / Line 99: @@
 Here we create a fractal noise and plug it into the '''Volume density function'''.
-[[File:luYu_fractalNoise.jpg|300px]]
+[[File:luYu_fractalNoise.jpg|450px]]<br>
-You will have to create a '''Transform input shader''' and change it to '''Use world space'''.This applies the noise in 3D space rather than mapping it onto the UV of the surface.
+You will have to create a '''Transform input shader''' and change it to '''Use world space'''. This applies the noise in 3D space rather than mapping it onto the UV of the surface.
 <br>
 You can also input textures with an Image map shader.
-[[File:3dnoiseAdded.jpg|876px]]
+[[File:3dnoiseAdded.jpg|876px]]<br>
 Here is the difference with the fractal noise applied in the '''Volume density function'''.
 <br>
 Note the areas where the light travels through the material, making some areas less homogeneous.
@@ Line 115: / Line 116: @@
 Back to the main tab of the '''Glass shader''',
-we now take a look at the '''Specular roughness'''.
+we now take a look at the '''Specular roughness'''.<br>
 The '''Specular roughness''' plays a more subtle, yet essential role to achieve a believable material.

← Older revision		Revision as of 21:36, 3 March 2020
Line 36:		Line 36:
	In the '''Glass shader''' properties window is a '''Sub-surface''' tab. This is where we will adjust how light behaves inside the object.		In the '''Glass shader''' properties window is a '''Sub-surface''' tab. This is where we will adjust how light behaves inside the object.

		+
		+	[[Image:GlassShader_v4.4_SubsurfaceTab_2019-11-06.01.png\|Glass Shader on the Sub-surface tab]]

← Older revision		Revision as of 12:13, 21 February 2020
Line 4:		Line 4:
	A PDF version of this document is available:		A PDF version of this document is available:

−	[[Media:~~Terragen_look_development_subsurface_scattering_v06~~.pdf]]	+	[[Media:Terragen_look_development_subsurface_scattering_v08.pdf]]

← Older revision		Revision as of 01:46, 20 February 2020
Line 9:		Line 9:
	[[File:luYu_defaultGrey.jpg\|876px]]		[[File:luYu_defaultGrey.jpg\|876px]]

−	The model we will use as a support for ~~this~~ series	+	The model we will use as a support for the Look Development series

← Older revision		Revision as of 00:54, 20 February 2020
Line 53:		Line 53:
	Think of it as the amount of droplets in a cloud or the quantity of air bubbles in ice.		Think of it as the amount of droplets in a cloud or the quantity of air bubbles in ice.

−	~~Here is the same pale red used for the Volume colour. See how it behaves when increasing the Volume density.~~

		+	[[File:density.jpg\|876px]]

−	~~[[File:~~density.~~jpg\|876px]]~~	+	Here is the same pale red used for the Volume colour. See how it behaves when increasing the Volume density.