Texture Coordinates - Revision history

EricChadwick: UV Best Practices from pior on the forums

2025-05-30T22:03:33Z

UV Best Practices from pior on the forums

EricChadwick: /* UV Tutorials & Threads */ Neox' thread

2024-05-16T23:25:40Z

‎UV Tutorials & Threads: Neox' thread

EricChadwick: /* UV Tutorials & Threads */ LOD tips from Neox

2020-05-18T01:40:55Z

‎UV Tutorials & Threads: LOD tips from Neox

EricChadwick: /* UV Map Grids */ re-ordered, circle first

2019-09-02T00:04:38Z

‎UV Map Grids: re-ordered, circle first

EricChadwick: /* UV Tutorials & Threads */ Head Unwrapping-Methods] Polycount Forum thread.

2018-05-08T12:13:41Z

‎UV Tutorials & Threads: Head Unwrapping-Methods] Polycount Forum thread.

EricChadwick: /* UV Map Grids */ muse_uv_01-01-1024x1024.jpg

2016-11-03T01:02:41Z

‎UV Map Grids: muse_uv_01-01-1024x1024.jpg

EricChadwick: /* UV Address Modes */ sub-tils

2016-09-07T12:36:52Z

‎UV Address Modes: sub-tils

EricChadwick: /* UV Tutorials */ What is your prefeered UV unwrapping application?

2016-08-28T12:11:58Z

‎UV Tutorials: What is your prefeered UV unwrapping application?

EricChadwick: /* UV Map Grids */ uv_mapping_grid_by_cymae.jpg

2016-07-27T13:44:28Z

‎UV Map Grids: uv_mapping_grid_by_cymae.jpg

EricChadwick: /* Softimage / XSI */

2016-07-11T14:15:04Z

‎Softimage / XSI

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 These numbers are usually hidden from the artist, replaced by helpful visual representations of how the textures are projected. Planes, cylinders and spheres help the artist align the textures in a visual way, but it helps to know that games only see the UV numbers that these shapes create.
-== UV Address Modes ==
+== UV Best Practices ==
-[[Image:opengl_clamping.png|none]]
-Image by [https://open.gl/textures Open.GL].
-There are four common methods for controlling how a texture is rendered when the UVs go beyond the 0-1 square. These methods can be chosen with a [[Shader]].
+UVs for game art are not just about cramming things into a single sheet; they are also and just as importantly about:
-* Repeat or Wrap is usually the default. The texture will tile.
+- Making the UVs human-readable so that another artist can take care of the texturing. Meaning, orienting the islands the right way up and grouping parts in a way that makes them as instantly identifiable as possible.
-* Mirror causes the texture to be flipped along each edge. Mirror has a tendency to create Rorschach/butterfly artifacts, but can be useful in certain situations like fences or railings.
-* Clamp causes the edge pixels to stretch outwards beyond the edges of the texture. Clamp is great for use with [[Cubemap]]s, since when the texture is [[Texture filtering|filtered]] you don't want seams to appear along the edges of each cube face.
-* Border causes a solid color to appear outside the edge of the texture. Border is good for use with [[Decal]]s, since you don't want the edges to tile and cause rendering seams.
-[[UDIM]] is another address method, not used in games. UDIM allows multiple textures to be used by a single model, by offsetting the textures in whole units across UV space. UDIM is useful for texturing in television and film to increase the number of textures per model in a logical and uniform way.
+- Taking into account the fact that the asset needs to behave well when down-sampled. Therefore having the appropriate amount of padding around the islands.
 == UV Tutorials & Threads ==
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 * [[Light map#Light_Map_Texture_Coordinates]]
 * [[Texture atlas]]
 == UV Tools ==

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 == UV Tutorials & Threads ==
 For better LODs, straighten the perimeter edges of the UV shells. Dents or protrusions along an optimized edge are more likely to create visible seams. The edges don't have to be 90°, diagonal is fine, but the longer and straighter the edges, the better the model can avoid artifacts during reduction.
 {| border="1"

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 == UV Tutorials & Threads ==
 {| border="1"
 |- style="vertical-align:top;"

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 {|
 | [[File:uvrefmap_circles_letters.jpg|thumb]]
 | [[File:uvrefmap_circles_noise.jpg|thumb]]
 |-
 | [[File:uvrefmap_circlesgreen_noise.jpg|thumb]]
 | [[File:uvrefmap_circlessquares.jpg|thumb]]
 | [[File:uvrefmap_nvidia_greengrid.jpg|thumb]]
 | [[File:uvrefmap_util-mark1.jpg|thumb]]
 |-
 | [[File:muse_uv_01-01-1024x1024.jpg|thumb]]
 |}
 ----
 [[Category:Texturing]] [[Category:EnvironmentTexturing]] [[Category:CharacterTexturing]] [[Category:PropsTexturing]] [[Category:TextureTechnique]] [[Category:Glossary]]

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 |}
 * [http://polycount.com/discussion/175293/what-is-your-prefeered-uv-unwrapping-application/p1 What is your prefeered UV unwrapping application?] Polycount Forum thread.
 * [http://polycount.com/discussion/156034/do-we-really-need-to-be-uv-mapping-in-2015/p1 Do we really need to be Uv mapping in 2015?] Polycount Forum thread.

← Older revision		Revision as of 12:36, 7 September 2016
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	[[UDIM]] is another address method, not used in games. UDIM allows multiple textures to be used by a single model, by offsetting the textures in whole units across UV space. UDIM is useful for texturing in television and film to increase the number of textures per model in a logical and uniform way.		[[UDIM]] is another address method, not used in games. UDIM allows multiple textures to be used by a single model, by offsetting the textures in whole units across UV space. UDIM is useful for texturing in television and film to increase the number of textures per model in a logical and uniform way.
		+
		+
		+	Usually a single texture pattern is tiled by UV'ing the model outside the 0-1 square. However, multiple tiling textures can be arranged in a [[Texture atlas]] as [http://udn.epicgames.com/Three/TerrainAdvancedTextures.html#Texture%20Packing:%20Implementing%20large%20texture%20tile%20sets sub-tiles] and cropped out using a [[Shaders\|shader]]. The shader for this is more expensive than traditional texture tiling, but can be used if you are limited by the number of textures you can use.

	== UV Tutorials & Threads ==		== UV Tutorials & Threads ==

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 * [http://www.sshadows2005.narod.ru/main/programming/softimage/headusuvlayout.htm Softimage Bridge to Headus UV Layout]
 * [http://www.creativecrash.com/xsi/downloads/scripts-plugins/texturing/c/ Texturing Scripts on CreativeCrash.com]
 == UV Map Grids ==