PBR Workflow - Revision history

DahBlount at 23:15, 22 September 2016

2016-09-22T23:15:13Z

← Older revision		Revision as of 23:15, 22 September 2016
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	==Converting Existing Maps==		==Converting Existing Maps==
			The same techniques apply to converting maps to PBR.

	===Albedo/Diffuse===		===Albedo/Diffuse===

DahBlount at 20:57, 3 September 2016

2016-09-03T20:57:48Z

← Older revision		Revision as of 20:57, 3 September 2016
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	==PBR Map Types==		==PBR Map Types==
	===Albedo===		===Albedo===
	The Albedo map replaces the diffuse map and is denoted by the basename texture (XXX.dds). Albedo maps contain no lighting information, so you will not multiply your ambient occlusion map into it. The link at the top of this article states that metals should have a black diffuse/albedo. This is misleading because many metals actually have visibly gray diffuse colors. For example, Silver has a diffuse of (30,30,30), making it a dark gray, while Steel and Aluminum have even darker diffuse colors at (5,5,5) and (13,13,13) respectively.		The Albedo map replaces the diffuse map and is denoted by the basename texture (XXX.dds). Albedo maps contain no lighting information, so you will not multiply your ambient occlusion map into it. The link at the top of this article states that metals should have a black diffuse/albedo. This is misleading because many metals actually have visibly gray diffuse colors. For example, Silver has a diffuse of (30,30,30), making it a dark gray, while Steel and Aluminum have even darker diffuse colors at (5,5,5) and (13,13,13) respectively. Additionally, some metals do have colored diffuse. Gold is a perfect example for this, as it has a diffuse color of (36,13,3).

	===Reflectance===		===Reflectance===
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	We'll start first by creating a mask so we can keep track of which parts are metal (White) and which parts are dielectric (black). We copy this over into the specular map file so we can start working there. We're going to simplify this a bit by assuming that all the different paint colors have the same specular color, all the metals have the same specular color, and finally, that the entire ship has a uniform glossiness.		We'll start first by creating a mask so we can keep track of which parts are metal (White) and which parts are dielectric (black). We copy this over into the specular map file so we can start working there. We're going to simplify this a bit by assuming that all the different paint colors have the same specular color, all the metals have the same specular color, and finally, that the entire ship has a uniform glossiness.

	We'll start with the gloss part as it's very simple: Just change the alpha channel to a uniform color. I think that a value of 0.15 is a good starting point. Next, we'll say that the specular value for the painted portions is around 0.2 as this is one of the commonly seen scanned values for paint. For the metallic portions, an RGB of 158, 173, 180 should do the trick.		We'll start with the gloss part as it's very simple: Just change the alpha channel to a uniform color. I think that a value of 0.15 is a good starting point. Next, we'll say that the specular value for the painted portions is around 0.2 as this is one of the commonly seen scanned values for paint. For the metallic portions, an RGB of (158,173,180) should do the trick.

DahBlount at 20:45, 3 September 2016

2016-09-03T20:45:39Z

← Older revision		Revision as of 20:45, 3 September 2016
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	==PBR Map Types==		==PBR Map Types==
	===Albedo===		===Albedo===
	The Albedo map replaces the diffuse map and is denoted by the basename texture (XXX.dds). Albedo maps contain no lighting information, so you will not multiply your ambient occlusion map into it. The link at the top of this article states that metals should have a black diffuse/albedo. This is misleading because many metals actually have visibly gray diffuse colors. For example, Silver has a diffuse of (30,30,30), making it a dark gray, while Steel and Aluminum have even darker diffuse colors at (5,5,5) and (13,13,13) respectively~~. Some metals do not exactly follow these rules (Gold for example), having slightly colored diffuse values that change with respect to minimal changes in their purity~~.		The Albedo map replaces the diffuse map and is denoted by the basename texture (XXX.dds). Albedo maps contain no lighting information, so you will not multiply your ambient occlusion map into it. The link at the top of this article states that metals should have a black diffuse/albedo. This is misleading because many metals actually have visibly gray diffuse colors. For example, Silver has a diffuse of (30,30,30), making it a dark gray, while Steel and Aluminum have even darker diffuse colors at (5,5,5) and (13,13,13) respectively.

	===Reflectance===		===Reflectance===
	The Reflectance map replaces the shine map and is denoted by the basename followed by the -reflect suffix (XXX-reflect.dds). Reflectance maps contain specular colors in the RGB channels and gloss information in the alpha channel. Any material can be glossy or matte, use gloss as you see fit, especially for scratches and buffs. Metals tend to have high, colored specular values, while dielectrics tend to have low, gray specular values.		The Reflectance map replaces the shine map and is denoted by the basename followed by the -reflect suffix (XXX-reflect.dds). Reflectance maps contain specular colors in the RGB channels and gloss information in the alpha channel. Any material can be glossy or matte, use gloss as you see fit, especially for scratches and buffs. Metals tend to have high, colored specular values, while dielectrics tend to have low, gray specular values. Some metals have different specular values depending upon the purity of the material or additional alloying materials (e.g. Vanadium Steel is different from High Carbon Steel).

	===Occlusion===		===Occlusion===

DahBlount at 20:42, 3 September 2016

2016-09-03T20:42:26Z

← Older revision		Revision as of 20:42, 3 September 2016
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	==PBR Map Types==		==PBR Map Types==
	===Albedo===		===Albedo===
	The Albedo map replaces the diffuse map and is denoted by the basename texture (XXX.dds). Albedo maps contain no lighting information, so you will not multiply your ambient occlusion map into it.		The Albedo map replaces the diffuse map and is denoted by the basename texture (XXX.dds). Albedo maps contain no lighting information, so you will not multiply your ambient occlusion map into it. The link at the top of this article states that metals should have a black diffuse/albedo. This is misleading because many metals actually have visibly gray diffuse colors. For example, Silver has a diffuse of (30,30,30), making it a dark gray, while Steel and Aluminum have even darker diffuse colors at (5,5,5) and (13,13,13) respectively. Some metals do not exactly follow these rules (Gold for example), having slightly colored diffuse values that change with respect to minimal changes in their purity.

	===Reflectance===		===Reflectance===
	The Reflectance map replaces the shine map and is denoted by the basename followed by the -reflect suffix (XXX-reflect.dds). Reflectance maps contain specular colors in the RGB channels and gloss information in the alpha channel.		The Reflectance map replaces the shine map and is denoted by the basename followed by the -reflect suffix (XXX-reflect.dds). Reflectance maps contain specular colors in the RGB channels and gloss information in the alpha channel. Any material can be glossy or matte, use gloss as you see fit, especially for scratches and buffs. Metals tend to have high, colored specular values, while dielectrics tend to have low, gray specular values.

	===Occlusion===		===Occlusion===
	The Occlusion map is a new addition and is denoted by the basename followed by the -ao suffix (XXX-ao.dds). The Occlusion map holds Ambient Occlusion in the red channel and Cavity Occlusion in the green channel with the blue and alpha channels remaining empty.		The Occlusion map is a new addition and is denoted by the basename followed by the -ao suffix (XXX-ao.dds). The Occlusion map holds Ambient Occlusion in the red channel and Cavity Occlusion in the green channel with the blue and alpha channels remaining empty. Ambient Occlusion is applied to ambient lighting while Cavity Occlusion is applied to the diffuse and specular lighting.


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	===Albedo/Diffuse===		===Albedo/Diffuse===
	[[Image:PBRTut01.png\|thumb\|right\|200px\|The albedo texture for the Medusa]]		[[Image:PBRTut01.png\|thumb\|right\|200px\|The albedo texture for the Medusa]]
	So let’s jump right into the thick of things. In this tutorial, I’m going to be using Hades’ Medusa as the subject of a proper PBR makeover. As you can see, I removed the grime and oxidation features for the most part as it’s easiest to make a visually brand spanking new Medusa. Additionally, I’ve removed the Ambient Occlusion because it now has its own texture slot in FSO. This is based off the blue Medusa I showed off in the PBR thread. One of the most important parts of making PBR textures is understanding the difference between Dielectrics and Metals. Simply put, Dielectrics have only diffuse color and gray specular while Metals have gray diffuse and a colored specular. Both can be glossy or matte as gloss is linked to microsurfacing, not material properties. For this, we’re going to make the already colored parts painted, while the gray parts will become metallic. Since FreeSpace takes place in outer space and the Medusa is a combat craft, I’ve elected to give it a uniformly rough surface which results in a very low gloss. After the basic albedo(diffuse) and specular maps have been created and tested, we’ll go ahead and give it some chipped paint and oxidation as if it had seen some hard years. Since the albedo is already finished, we just need to convert the shine map into a reflectance map.		So let’s jump right into the thick of things. In this tutorial, I’m going to be using Hades’ Medusa as the subject of a proper PBR makeover. As you can see, I removed the grime and oxidation features for the most part as it’s easiest to make a visually brand spanking new Medusa. Additionally, I’ve removed the Ambient Occlusion because it now has its own texture slot in FSO. This is based off the blue Medusa I showed off in the PBR thread. Since FreeSpace takes place in outer space and the Medusa is a combat craft, I’ve elected to give it a uniformly rough surface which results in a very low gloss. After the basic albedo(diffuse) and specular maps have been created and tested, we’ll go ahead and give it some chipped paint and oxidation as if it had seen some hard years. Since the albedo is already finished, we just need to convert the shine map into a reflectance map.

DahBlount at 20:18, 3 August 2016

2016-08-03T20:18:53Z

@@ Line 13: / Line 13: @@
 ==Making new maps==
-Generally, creating new PBR textures is nearly identical to making them the old way, you just do it using physically accurate values for the Albedo and Reflectance maps. Additionally, there are a multitude of tools being released that enable automated creation of PBR assets. The examples I personally recommend are Quixel Suite, Marmoset Toolbag, and Substance Painter.
+Generally, creating new PBR textures is nearly identical to making them the old way, you just do it using physically accurate values for the Albedo and Reflectance maps. Additionally, there are a multitude of tools being released that enable automated creation of PBR assets. The examples I personally recommend are Quixel Suite, Marmoset Toolbag, and Substance Painter. Unfortunately, these tools are quite expensive, but you can actually use many of the techniques they implement in programs like GIMP and Photoshop. I'm going to be using Photoshop, but I will include the GIMP equivalent of a feature if required.
 ==Converting Existing Maps==

DahBlount at 20:02, 3 August 2016

2016-08-03T20:02:00Z

← Older revision		Revision as of 20:02, 3 August 2016
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			==Making new maps==
			Generally, creating new PBR textures is nearly identical to making them the old way, you just do it using physically accurate values for the Albedo and Reflectance maps. Additionally, there are a multitude of tools being released that enable automated creation of PBR assets. The examples I personally recommend are Quixel Suite, Marmoset Toolbag, and Substance Painter.

			TODO

	==Converting Existing Maps==		==Converting Existing Maps==
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	~~==Making new maps==~~
	Generally, creating new PBR textures is nearly identical to making them the old way, you just do it using physically accurate values for the Albedo and Reflectance maps. Additionally, there are a multitude of tools being released that enable automated creation of PBR assets. The examples I personally recommend are Quixel Suite, Marmoset Toolbag, and Substance Painter.

	~~TODO~~

	[[Category:Tutorials]]		[[Category:Tutorials]]

DahBlount at 17:26, 26 July 2016

2016-07-26T17:26:35Z

← Older revision		Revision as of 17:26, 26 July 2016
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	We'll start first by creating a mask so we can keep track of which parts are metal (White) and which parts are dielectric (black). We copy this over into the specular map file so we can start working there. We're going to simplify this a bit by assuming that all the different paint colors have the same specular color, all the metals have the same specular color, and finally, that the entire ship has a uniform glossiness.		We'll start first by creating a mask so we can keep track of which parts are metal (White) and which parts are dielectric (black). We copy this over into the specular map file so we can start working there. We're going to simplify this a bit by assuming that all the different paint colors have the same specular color, all the metals have the same specular color, and finally, that the entire ship has a uniform glossiness.

	We'll start with the gloss part as it's very simple: Just change the alpha channel to a uniform color. I think that a value of 0.15 is a good starting point. Next, we'll say that the specular value for the painted portions is around 0.2 as this is one of the commonly seen scanned values for paint. For the metallic portions, an ~~sRGB~~ of 158, 173, 180 should do the trick.		We'll start with the gloss part as it's very simple: Just change the alpha channel to a uniform color. I think that a value of 0.15 is a good starting point. Next, we'll say that the specular value for the painted portions is around 0.2 as this is one of the commonly seen scanned values for paint. For the metallic portions, an RGB of 158, 173, 180 should do the trick.


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	In the shaders, Ambient Occlusion is applied only to ambient lighting while Cavity Occlusion is applied to the diffuse and specular lighting.		In the shaders, Ambient Occlusion is applied only to ambient lighting while Cavity Occlusion is applied to the diffuse and specular lighting.

			Note: An actual Cavity Occlusion map sometimes is difficult to get, especially one that looks good, so a decent alternative is to copy the Ambient Occlusion into the green channel as well.

DahBlount at 17:23, 26 July 2016

2016-07-26T17:23:36Z

← Older revision		Revision as of 17:23, 26 July 2016
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	===Occlusion===		===Occlusion===
	The Occlusion map is a new addition and is denoted by the basename followed by the -ao suffix (XXX-ao.dds). The Occlusion map holds Ambient Occlusion in the red channel and Cavity Occlusion in the green channel with the blue and alpha channels remaining empty.		The Occlusion map is a new addition and is denoted by the basename followed by the -ao suffix (XXX-ao.dds). The Occlusion map holds Ambient Occlusion in the red channel and Cavity Occlusion in the green channel with the blue and alpha channels remaining empty.



	==Converting Existing Maps==		==Converting Existing Maps==

DahBlount at 17:23, 26 July 2016

2016-07-26T17:23:09Z

← Older revision		Revision as of 17:23, 26 July 2016
Line 30:		Line 30:
	We'll start first by creating a mask so we can keep track of which parts are metal (White) and which parts are dielectric (black). We copy this over into the specular map file so we can start working there. We're going to simplify this a bit by assuming that all the different paint colors have the same specular color, all the metals have the same specular color, and finally, that the entire ship has a uniform glossiness.		We'll start first by creating a mask so we can keep track of which parts are metal (White) and which parts are dielectric (black). We copy this over into the specular map file so we can start working there. We're going to simplify this a bit by assuming that all the different paint colors have the same specular color, all the metals have the same specular color, and finally, that the entire ship has a uniform glossiness.

	We'll start with the gloss part as it's very simple: Just change the alpha channel to a uniform color. I think that a value of 0.15 is a good starting point. Next we'll, say that the specular value for the painted portions is around 0.2 as this is one of the commonly seen scanned values for paint. For the metallic portions, an sRGB of 158, 173, 180 should do the trick.		We'll start with the gloss part as it's very simple: Just change the alpha channel to a uniform color. I think that a value of 0.15 is a good starting point. Next, we'll say that the specular value for the painted portions is around 0.2 as this is one of the commonly seen scanned values for paint. For the metallic portions, an sRGB of 158, 173, 180 should do the trick.

DahBlount at 04:23, 26 July 2016

2016-07-26T04:23:59Z

← Older revision		Revision as of 04:23, 26 July 2016
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	It is recommended that you read the [https://docs.google.com/document/d/1Fb9_KgCo0noxROKN4iT8ntTbx913e-t4Wc2nMRWPzNk/edit Physically Based Rendering Encyclopedia] before examining this document as it covers the theory behind PBR. While not required, it does cover more complex topics that may assist you in creating your assets by hand.		It is recommended that you read the [https://docs.google.com/document/d/1Fb9_KgCo0noxROKN4iT8ntTbx913e-t4Wc2nMRWPzNk/edit Physically Based Rendering Encyclopedia] before examining this document as it covers the theory behind PBR. While not required, it does cover more complex topics that may assist you in creating your assets by hand.

			==PBR Map Types==
			===Albedo===
			The Albedo map replaces the diffuse map and is denoted by the basename texture (XXX.dds). Albedo maps contain no lighting information, so you will not multiply your ambient occlusion map into it.

			===Reflectance===
			The Reflectance map replaces the shine map and is denoted by the basename followed by the -reflect suffix (XXX-reflect.dds). Reflectance maps contain specular colors in the RGB channels and gloss information in the alpha channel.

			===Occlusion===
			The Occlusion map is a new addition and is denoted by the basename followed by the -ao suffix (XXX-ao.dds). The Occlusion map holds Ambient Occlusion in the red channel and Cavity Occlusion in the green channel with the blue and alpha channels remaining empty.

	==Converting Existing Maps==		==Converting Existing Maps==