PBR Reference Guide - Revision history

Mobius: wikipedia ---> Wikipedia

2021-01-23T16:49:41Z

wikipedia ---> Wikipedia

← Older revision		Revision as of 16:49, 23 January 2021
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	===Key Concepts===		===Key Concepts===
	The ~~wikipedia~~ pages on [https://en.wikipedia.org/wiki/Physically_based_rendering Physically Based Rendering] and [https://en.wikipedia.org/wiki/Bidirectional_reflectance_distribution_function BRDFs] are particularly good to read and keep in mind when working on PBR assets.		The Wikipedia pages on [https://en.wikipedia.org/wiki/Physically_based_rendering Physically Based Rendering] and [https://en.wikipedia.org/wiki/Bidirectional_reflectance_distribution_function BRDFs] are particularly good to read and keep in mind when working on PBR assets.

	==The Basics==		==The Basics==

TopAce: /* Specular/Reflectance */ another wrong usage of "it's"

2021-01-23T06:38:24Z

Specular/Reflectance: another wrong usage of "it's"

← Older revision		Revision as of 06:38, 23 January 2021
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	===Specular/Reflectance===		===Specular/Reflectance===
	This map has the format, ***-reflect. It contains the following information in ~~it's~~ channels:		This map has the format, ***-reflect. It contains the following information in its channels:
	*RGB - Specular color.		*RGB - Specular color.
	*Alpha - Gloss/shininess.		*Alpha - Gloss/shininess.

TopAce: fixing WP links

2021-01-23T06:35:09Z

fixing WP links

← Older revision		Revision as of 06:35, 23 January 2021
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	===Key Concepts===		===Key Concepts===
	The wikipedia pages on [https://en.wikipedia.org/wiki/Physically_based_rendering/ Physically Based Rendering] and [https://en.wikipedia.org/wiki/Bidirectional_reflectance_distribution_function/ BRDFs] are particularly good to read and keep in mind when working on PBR assets.		The wikipedia pages on [https://en.wikipedia.org/wiki/Physically_based_rendering Physically Based Rendering] and [https://en.wikipedia.org/wiki/Bidirectional_reflectance_distribution_function BRDFs] are particularly good to read and keep in mind when working on PBR assets.

	==The Basics==		==The Basics==

TopAce: formatting and spelling

2021-01-23T06:34:20Z

formatting and spelling

← Older revision		Revision as of 06:34, 23 January 2021
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	==Introduction==		==Introduction==
	As of release 3.8.0, the FS2 Open engine supports Physically Based Rendering. Along with it comes many new hurdles for asset creators, and the need for a guide on the matter. This article is designed mostly as a reference guide that can serve as a basis for workflows and as a refresher if needed.		As of release 3.8.0, the FS2 Open engine supports '''Physically Based Rendering'''. Along with it comes many new hurdles for asset creators, and the need for a guide on the matter. This article is designed mostly as a reference guide that can serve as a basis for workflows and as a refresher if needed.

	===Key Concepts===		===Key Concepts===
	The wikipedia pages on [https://en.wikipedia.org/wiki/Physically_based_rendering/ ~~'''~~Physically Based Rendering~~'''~~] and [https://en.wikipedia.org/wiki/Bidirectional_reflectance_distribution_function/ BRDFs] are particularly good to read and keep in mind when working on PBR assets.		The wikipedia pages on [https://en.wikipedia.org/wiki/Physically_based_rendering/ Physically Based Rendering] and [https://en.wikipedia.org/wiki/Bidirectional_reflectance_distribution_function/ BRDFs] are particularly good to read and keep in mind when working on PBR assets.

	==The Basics==		==The Basics==
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	Essentially, metals should be very dark grays to black, with the exception of a few members of the Gold/Platinum group (Gold has a very dark orange-brown diffuse color), while dielectrics can be whatever color you want.		Essentially, metals should be very dark grays to black, with the exception of a few members of the Gold/Platinum group (Gold has a very dark orange-brown diffuse color), while dielectrics can be whatever color you want.

	Additionally, the diffuse map should no longer contain any lighting information. The ambient occlusion map you bake for your asset should be in ~~it's~~ own texture now.		Additionally, the diffuse map should no longer contain any lighting information. The ambient occlusion map you bake for your asset should be in its own texture now.

	===Specular/Reflectance===		===Specular/Reflectance===

TopAce: boldening

2021-01-23T06:32:20Z

boldening

← Older revision		Revision as of 06:32, 23 January 2021
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	===Key Concepts===		===Key Concepts===
	The wikipedia pages on [https://en.wikipedia.org/wiki/Physically_based_rendering/ Physically Based Rendering] and [https://en.wikipedia.org/wiki/Bidirectional_reflectance_distribution_function/ BRDFs] are particularly good to read and keep in mind when working on PBR assets.		The wikipedia pages on [https://en.wikipedia.org/wiki/Physically_based_rendering/ '''Physically Based Rendering'''] and [https://en.wikipedia.org/wiki/Bidirectional_reflectance_distribution_function/ BRDFs] are particularly good to read and keep in mind when working on PBR assets.

	==The Basics==		==The Basics==

MatthTheGeek: /* Substance Painter */

2021-01-20T12:06:21Z

Substance Painter

← Older revision		Revision as of 12:06, 20 January 2021
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	===Substance Painter===		===Substance Painter===
	[https://www.allegorithmic.com/products/substance-painter/ Substance Painter] is a 3D painting software created by Allegorithmic. It can be purchased under a multitude of plans (including a perpetual license), although an educational license is available.		[https://www.allegorithmic.com/products/substance-painter/ Substance Painter] is a 3D painting software created by Allegorithmic. It can be purchased under a multitude of plans (including a perpetual license), although an educational license is available.

			Updated presets can be found here: [https://sectorgame.com/fsfiles/repo/data/Axem/Other/SP_FreeSpace2_Presets3.rar Substance Painter presets]

	===Quixel Suite===		===Quixel Suite===

DahBlount at 20:15, 22 December 2017

2017-12-22T20:15:24Z

← Older revision		Revision as of 20:15, 22 December 2017
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	===Occlusion===		===Occlusion===
	This new map, denoted by the format ***-ao.dds, contains all non-emissive lighting information for your asset. For this texture, only two channels are used, one contains Ambient Occlusion information, while the other contains Cavity Occlusion information.		This new map, denoted by the format ***-ao.dds, contains all non-emissive lighting information for your asset. For this texture, only two channels are used, one contains Ambient Occlusion information, while the other contains Cavity Occlusion information.

			===Special Cases===
			So, say you're working with a model, and it's not clear whether a material is a metal or dielectric. Things like metalloids (elemental silicon might seem metallic at first, but looks can be deceiving), certain minerals and organics, and anodized metals don't fall clearly into either category. Generally speaking, you're gonna need to isolate the diffuse and specular colors of these materials and texture accordingly. Here's what I recommend you do:
			*Metalloids and Anodized Metals
			**Take a metal of your choice, copy the specular to the diffuse and darken it to about 80% to 90% of the specular value.
			*Special Minerals/Organics and Clearcoat/Metallic paints
			**Unfortunately, we would most likely need to implement a clearcoat shader to properly simulate most of these, but there is generally a clear difference between the diffuse and specular colors in this case, which should be sufficient for your use case.


	[[Category:Modding]]		[[Category:Modding]]

DahBlount at 03:29, 21 December 2017

2017-12-21T03:29:23Z

← Older revision		Revision as of 03:29, 21 December 2017
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	===Specular/Reflectance===		===Specular/Reflectance===
	This new map, denoted by the format ***-reflect.~~img~~, replaces the shine map used by old assets. Shine maps contained specular color information in the RGB channels, as well as an "environment reflectance" value in the Alpha channel, which determined the mip level or accuracy of environment reflections. Reflectance maps rearrange how this information is stored; The RGB channels store specular color as the overall color and "metalness" as the magnitude of the color value, while the Alpha channel now contains the Gloss of the material. That's right, you can now do per pixel gloss instead of the old -ogl_spec commandline parameter.		This new map, denoted by the format ***-reflect.dds, replaces the shine map used by old assets. Shine maps contained specular color information in the RGB channels, as well as an "environment reflectance" value in the Alpha channel, which determined the mip level or accuracy of environment reflections. Reflectance maps rearrange how this information is stored; The RGB channels store specular color as the overall color and "metalness" as the magnitude of the color value, while the Alpha channel now contains the Gloss of the material. That's right, you can now do per pixel gloss instead of the old -ogl_spec commandline parameter.

	This texture should contain only color information for metallic materials. I shouldn't need to tell you what a metal is. Metals tend to be very bright white to gray, but can have some additional coloration like blue, although there's always copper and gold as notably colorful metals. Dielectrics should be dark to medium grays.		This texture should contain only color information for metallic materials. I shouldn't need to tell you what a metal is. Metals tend to be very bright white to gray, but can have some additional coloration like blue, although there's always copper and gold as notably colorful metals. Dielectrics should be dark to medium grays.
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	===Occlusion===		===Occlusion===
	This new map, denoted by the format ***-ao.~~img~~, contains all non-emissive lighting information for your asset. For this texture, only two channels are used, one contains Ambient Occlusion information, while the other contains Cavity Occlusion information.		This new map, denoted by the format ***-ao.dds, contains all non-emissive lighting information for your asset. For this texture, only two channels are used, one contains Ambient Occlusion information, while the other contains Cavity Occlusion information.

	[[Category:Modding]]		[[Category:Modding]]

DahBlount at 03:28, 21 December 2017

2017-12-21T03:28:48Z

@@ Line 4: / Line 4: @@
 ===Key Concepts===
 The wikipedia pages on [https://en.wikipedia.org/wiki/Physically_based_rendering/ Physically Based Rendering] and [https://en.wikipedia.org/wiki/Bidirectional_reflectance_distribution_function/ BRDFs] are particularly good to read and keep in mind when working on PBR assets.
 ==The Basics==
 The PBR workflow for FSO introduces two new texture maps, as well as some constraints on old texture types.
 Remember, PBR materials are (mostly) split up into two types:
-*Dielectric
+*Dielectric/Nonmetallic
 *Metallic
 Technically, elements that we refer to as metalloids or semi-metals on the periodic table have some properties from both dielectrics and metals, but this will be covered later.
@@ Line 59: / Line 40: @@
 Now, just export the Diffuse group as your new diffuse texture and the Reflect group plus the Alpha channel as your -reflect map.
 ==The Not So Basics==

DahBlount at 17:19, 20 December 2017

2017-12-20T17:19:05Z

← Older revision		Revision as of 17:19, 20 December 2017
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	6. Finally, create a new Alpha channel. Go back to your diffuse texture and select any pixels you want to have a specific gloss level, then use your selection as a mask for the gray value associated with the gloss you want. Darker grays are less glossy, lighter grays are more glossy.		6. Finally, create a new Alpha channel. Go back to your diffuse texture and select any pixels you want to have a specific gloss level, then use your selection as a mask for the gray value associated with the gloss you want. Darker grays are less glossy, lighter grays are more glossy.

			Now, just export the Diffuse group as your new diffuse texture and the Reflect group plus the Alpha channel as your -reflect map.

	==The Not So Basics==		==The Not So Basics==