Cube map - Revision history

EricChadwick: /* Cubemap Seams */ Clamp link

2018-08-22T21:25:05Z

‎Cubemap Seams: Clamp link

Nelios: Fixed polycount links

2015-11-03T11:58:37Z

Fixed polycount links

EricChadwick: /* V-Ray Cube Map Rendering */

2015-07-25T23:58:40Z

‎V-Ray Cube Map Rendering

EricChadwick: /* V-Ray Cube Map Rendering */ figured it out!

2015-07-25T23:51:01Z

‎V-Ray Cube Map Rendering: figured it out!

EricChadwick: /* Software */ alphabetical

2015-07-25T13:08:55Z

‎Software: alphabetical

EricChadwick: /* Reflect/Refract Map */ Jude Godin tutorial

2015-07-24T13:42:41Z

‎Reflect/Refract Map: Jude Godin tutorial

EricChadwick: /* Creating Cubemaps */ Unreal Engine

2015-07-09T20:04:37Z

‎Creating Cubemaps: Unreal Engine

EricChadwick: /* 3ds Max */ vray in progrsss

2015-07-02T16:33:18Z

‎3ds Max: vray in progrsss

EricChadwick: categories

2015-06-10T22:41:19Z

EricChadwick: /* 3ds Max */ Create Six Cameras

2015-06-05T13:55:45Z

‎3ds Max: Create Six Cameras

@@ Line 229: / Line 229: @@
 Cubemaps can show seams along the edges of the cube if they aren't mapped properly.
-When a cubemap is rendered automatically in graphics hardware by a game engine, it will be seamless because it uses the '''Clamp''' uv address mode.
+When a cubemap is rendered automatically in graphics hardware by a game engine, it will be seamless because it uses the [[Texture_Coordinates#UV_Address_Modes|'''Clamp''']] uv address mode.
 However if an artist manually creates a cube mesh and maps the six bitmaps onto it, usually this will cause seams from texture filtering. By default most materials use the '''Wrap''' uv address mode, which allows a texture to tile across a mesh. With a cubemap however this causes a sliver of the opposite side of each texture to be filtered into each edge. If your material has the option to use Clamp instead of Wrap, this will remove the seams.

@@ Line 208: / Line 208: @@
 "Lys is an ultra-fast GPU powered solution that sets the standard for generating Radiance, Irradiance and Specular textures from panoramic, Sphere or 2d cube map cross source textures for use with HDR Image Based Lighting."
-* [http://www.polycount.com/forum/showthread.php?p=2249502 Lys 1.0 Released!]
+* [http://polycount.com/discussion/148953 Lys 1.0 Released!]
 [[image:Lys_axis_rotation_3_855px.jpg|left|thumb|600px|Image by [http://www.metalliandy.com/ Andy "metalliandy Davies].]]<br clear="all"/>
@@ Line 215: / Line 215: @@
 The easiest way to render a Maya scene into a cubemap is to use six cameras, then stitch the six images together into a cubemap.
-Workflow tips can be found in the Polycount thread [[http://www.polycount.com/forum/showthread.php?t=75213|[Maya 2009] how to render an environment map?]].
+Workflow tips can be found in the Polycount thread [[http://polycount.com/discussion/75213|[Maya 2009] how to render an environment map?]].
 === Photoshop ===
@@ Line 224: / Line 224: @@
 === Unreal Engine ===
-* [http://www.polycount.com/forum/showthread.php?t=139823 Baking cubemaps inside UE4]
+* [http://polycount.com/discussion/139823 Baking cubemaps inside UE4]
 == Cubemap Seams ==
@@ Line 250: / Line 250: @@
 == Resources ==
-* [http://www.polycount.com/forum/showthread.php?t=96380 Big cube map pack] free cubemaps by [http://www.humus.name Emil 'Humus' Persson] and [http://www.kostas.se/ Kostas 'kodde' Gialitakis]
+* [http://polycount.com/discussion/96380 Big cube map pack] free cubemaps by [http://www.humus.name Emil 'Humus' Persson] and [http://www.kostas.se/ Kostas 'kodde' Gialitakis]
 * [http://cgtextures.com/textures.php?t=browse&q=23740 CG Textures - Panoramic Skies] free sky panoramas.
 * [http://www.philohome.com/skycollec/skycollec.htm Philo's Sky Collection] free sky panoramas.
@@ Line 262: / Line 262: @@
 == Tutorials ==
 * [https://judegodin.wordpress.com/2011/12/06/how-the-hell-do-i-make-a-cubemap/ How the Hell do I make a cubemap with my own art?] by [http://judegodin.wordpress.com Jude Godin]
-* [http://www.polycount.com/forum/showthread.php?t=147893 Abstract skybox creation] on the Polycount forum.
+* [http://polycount.com/discussion/147893 Abstract skybox creation] on the Polycount forum.
 * [[Diffusely convolved cube map]] wiki page describes how to downsample cubemaps to use for lighting.
 * [http://www.zdepth.ch/tutorial/an-introduction-to-cube-mapping/ An introduction to cubemaps - Tutorial] by [http://www.zdepth.ch/about/ Zeller Samuel]. A great introduction to cubemaps.
 * [http://www.cgtextures.com/content.php?action=tutorial&name=cubemaps Cubemaps Tutorial] by CGTextures.com. Tutorial using Photoshop, NVIDIA's Photoshop plugin, and [[CubeMapGen]] to convert cubemaps into various layouts.
-* [http://www.polycount.com/forum/showthread.php?t=82620 Correct uvmapping for a cub to preview cubemap] on the Polycount forum.
+* [http://polycount.com/discussion/82620 Correct uvmapping for a cub to preview cubemap] on the Polycount forum.
 * [http://vterrain.org/Atmosphere/ Virtual Terrain Project: Sky / Atmospheric Rendering] has many links to sky rendering resources.
-* [http://boards.polycount.net/showthread.php?t=45543 360 HDR skies for sale?] from the [http://boards.polycount.net Polycount forums] has a tutorial and links about photographing HDR skies.
+* [http://polycount.com/discussion/45543 360 HDR skies for sale?] from the [http://polycount.com/forum Polycount forums] has a tutorial and links about photographing HDR skies.
 * [http://www.outpt.co.uk/how-to-create-a-terragen-2-skybox/ How to: Create a Terragen 2 Skybox] by ''[http://www.outpt.co.uk/about/ Outpt]''.
 * [https://www.youtube.com/watch?&v=qU0hdaFARQo 3dmotive.com - Creating a Skydome] is a tutorial for converting a latlong sky into a spheremap layout and mapping it to a dome mesh with Photoshop and 3ds Max. [https://www.3dmotive.com/freebies More free tutorials here].
-* [http://boards.polycount.net/showthread.php?t=68600 Skymap workflow] by ''[http://boards.polycount.net/member.php?u=27009 divi]'' is a quick tutorial about converting a latlong sky into a square dome-like layout that uses all the texture space. [[attachment:Skymap_workflow.pdf|PDF here]]
+* [http://polycount.com/discussion/68600 Skymap workflow] by ''[http://polycount.com/profile/divi divi]'' is a quick tutorial about converting a latlong sky into a square dome-like layout that uses all the texture space. [[attachment:Skymap_workflow.pdf|PDF here]]
 * [http://www.outpt.co.uk/how-to-convert-a-skybox-to-a-skydome/ How to: Convert a Skybox to a Skydome] by ''[http://www.outpt.co.uk/about/ Outpt]'' is an in-depth tutorial about converting a cubemap into a latlong image with [http://developer.amd.com/gpu/cubemapgen/pages/default.aspx CubeMapGen], HDRShop, Photoshop, and Unreal.
-* [http://www.polycount.com/forum/showthread.php?t=74503 Environment Cube Maps: HDR VS LDR] thread on the Polycount forum.
+* [http://polycount.com/discussion/74503 Environment Cube Maps: HDR VS LDR] thread on the Polycount forum.
 == Software ==

@@ Line 130: / Line 130: @@
 ==== V-Ray Cube Map Rendering ====
-V-Ray's [http://docs.chaosgroup.com/display/VRAY3/Camera#Camera-CameraType "Box" camera type] will render a vertical cubecross with no GI seams.
+You can use V-Ray's [http://docs.chaosgroup.com/display/VRAY3/Camera#Camera-CameraType "Box" camera type] to render a cubemap with no lighting seams. Because V-Ray uses Global Illumination, if you try to use six cameras it will add seams between the six separate lighting solutions.
-# Place a VRayPhysicalCamera in your scene, pointing where you want the cube Front to be.
+The tutorial: '''[http://www.pixelsonic.com/2011/04/360%C2%B0-in-3ds-max-with-vray-2/ 360° in 3Ds Max with VRay – Pixelsonic]''' explains how to use the Spherical camera type, but this will create blurry/smeared poles, which look terrible when converted into cube faces. Their example panorama avoids the errors because it has a flat-colored floor. But if there was a pattern there (grass, carpet, etc.) it would show the poles to be very obviously stretched.
 # Render Setup:
 #* Output Size = 3x wide, 4x tall. For example, if you want 1024x1024 for each cube face, then render 3072x4096.
-#* Save File = set your filename, location, format, for the cubecross render.
+#* Save File = set your filename, location, format. This is for the vertical cubecross format, which V-Ray creates.
 #* V-Ray tab, V-Ray:: Camera, Type = Box, Override FOV = 90.
 # Render.
 If you need to convert the vertical cubecross into six cube faces, you can use the Material Editor to do it:
@@ Line 152: / Line 157: @@
 # Right-click on the sample image, Render Map, Range = 0-5, Dimensions = (choose your resolution), Files = (set file prefix, location, format).
 # Render.
+#* This will create six perfectly-seamless cube faces.
-This will create six perfectly-seamless cube faces.
+#* This animation setup will work with any resolution cubecross. Simply replace the bitmap, and re-render the same animation.
 ==== 3ds Max to Unity ====

← Older revision		Revision as of 23:51, 25 July 2015
Line 130:		Line 130:

	==== V-Ray Cube Map Rendering ====		==== V-Ray Cube Map Rendering ====
		+	V-Ray's [http://docs.chaosgroup.com/display/VRAY3/Camera#Camera-CameraType "Box" camera type] will render a vertical cubecross with no GI seams.
		+
		+	# Place a VRayPhysicalCamera in your scene, pointing where you want the cube Front to be.
		+	# Render Setup:
		+	#* Output Size = 3x wide, 4x tall. For example, if you want 1024x1024 for each cube face, then render 3072x4096.
		+	#* Save File = set your filename, location, format, for the cubecross render.
		+	#* V-Ray tab, V-Ray:: Camera, Type = Box, Override FOV = 90.
		+	# Render.
		+
		+	If you need to convert the vertical cubecross into six cube faces, you can use the Material Editor to do it:
		+	# Load the cubecross bitmap in the Material Editor.
		+	# U Tiling = 0.33333
		+	# V Tiling = 0.25
		+	# Turn on Auto Key to animate the following:
		+	#* To see the +X cube face, at frame 0... U Offset = 1.0, V Offset = -0.5, W Angle = 0.
		+	#* To see the -X cube face, at frame 1... U Offset -1.0, V Offset -0.5, W Angle 0.
		+	#* To see the +Y cube face, at frame 2... U Offset 0, V Offset 1.5, W Angle 180.
		+	#* To see the -Y cube face, at frame 3... U Offset 0, V Offset -0.5, W Angle 180.
		+	#* To see the +Z cube face, at frame 4... U Offset 0, V Offset -1.5, W Angle 180.
		+	#* To see the -Z cube face, at frame 5... U Offset 0, V Offset -0.5, W Angle 0.
		+	# Right-click on the sample image, Render Map, Range = 0-5, Dimensions = (choose your resolution), Files = (set file prefix, location, format).
		+	# Render.
		+
		+	This will create six perfectly-seamless cube faces.
		+
		+	==== 3ds Max to Unity ====
	* [http://www.pixelenvision.com/2242/maxscript-vray-cubemap-generator-for-unity/ Maxscript – Vray Cubemap Generator for Unity] creates a default 3ds Max camera at the origin and renders six cubemap faces, named to match Unity's convention.		* [http://www.pixelenvision.com/2242/maxscript-vray-cubemap-generator-for-unity/ Maxscript – Vray Cubemap Generator for Unity] creates a default 3ds Max camera at the origin and renders six cubemap faces, named to match Unity's convention.

@@ Line 245: / Line 245: @@
 == Software ==
 * [http://www.outerspace-software.com/bixorama.html Bixorama] ($) panorama conversion utility (warning... conversions are aliased and jaggy).
 * [http://seblagarde.wordpress.com/2012/06/10/amd-cubemapgen-for-physically-based-rendering/ Cubemapgen physically based rendering mod] by Sébastien Lagarde.
 * [http://msdn.microsoft.com/en-us/directx/aa937788.aspx DirectX SDK] has the DxTex tool from Microsoft.

← Older revision		Revision as of 13:42, 24 July 2015
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	Warning: The render cannot be canceled once the object is picked, so save your Max file before rendering, in case Max freezes!		Warning: The render cannot be canceled once the object is picked, so save your Max file before rendering, in case Max freezes!
		+
		+	* [https://judegodin.wordpress.com/2011/12/06/how-the-hell-do-i-make-a-cubemap/ How the Hell do I make a cubemap with my own art?] by [https://judegodin.wordpress.com Jude Godin] walks through the process step-by-step, to create a hand-painted cubemap.

	==== Create Six Cameras ====		==== Create Six Cameras ====

@@ Line 147: / Line 147: @@
 # For each of the other cube faces, select the View->Cube Map Face menu item and select a face from the list that appears.
 # Select the File->Open Onto This Cubemap Face... menu item and select a texture to open from the dialog that pops up.
 === Hugin ===
@@ Line 188: / Line 171: @@
 # Stitch!
 # Use [[XnView]] to convert to low dynamic range (Gamma 1.66 seems good).
 == Cubemap Seams ==

@@ Line 91: / Line 91: @@
 === 3ds Max ===
-There are three main ways to create cubemaps in 3ds Max:
+There are multiple ways to create cubemaps in 3ds Max.
 # [[#Metal Bump9|Metal Bump9]] ... saves directly into DDS cubemap format, but it's limited to 256x256 and you can't set the [[DDS]] compression format (it always uses ARGB, which is uncompressed).
 # [[#Reflect/Refract Map|Reflect/Refract Map]] ... more steps, but you're not limited to a particular resolution or format. However, does not support more than 24bit color, you can't output HDR with it. Also V-Ray does not support the Reflect/Refract map.
@@ Line 124: / Line 126: @@
 * Here's a zip file with the six cameras: [http://www.ericchadwick.com/examples/files/cameras_six_for_rendering_cube_views.zip cameras_six_for_rendering_cube_views.zip]
 * Adaptive renderers may create seams, because the lighting calculations are done individually for each camera. You may be able to solve this by pre-caching the lighting passes. V-Ray can render a single panoramic camera, which can be converted into cube faces, see [http://renderstuff.com/creating-virtual-360-panorama-cg-tutorial/ 360 panorama in 3ds Max tutorial].
 === DxTex ===

← Older revision		Revision as of 22:41, 10 June 2015
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	----		----
−	[[Category:TextureFormat]]	+	[[Category:TextureFormat]] [[Category:Texturing]] [[Category:Environment]]

@@ Line 94: / Line 94: @@
 # [[#Metal Bump9|Metal Bump9]] ... saves directly into DDS cubemap format, but it's limited to 256x256 and you can't set the [[DDS]] compression format (it always uses ARGB, which is uncompressed).
 # [[#Reflect/Refract Map|Reflect/Refract Map]] ... more steps, but you're not limited to a particular resolution or format. However, does not support more than 24bit color, you can't output HDR with it. Also V-Ray does not support the Reflect/Refract map.
-# Create six cameras ... a lot more work, but you can render HDR output, and use any renderer you wish. Here's a zip file with the six cameras: [http://www.ericchadwick.com/examples/files/cameras_six_for_rendering_cube_views.zip cameras_six_for_rendering_cube_views.zip]
+# [[#Create Six Cameras|Create six cameras]] ... a lot more work, but you can render HDR output, and use any renderer you wish. Here's a zip file with the six cameras: [http://www.ericchadwick.com/examples/files/cameras_six_for_rendering_cube_views.zip cameras_six_for_rendering_cube_views.zip]
 ds Max can display cubemap reflections in real-time if you use the DDS cubemap format and a DirectX Shader material.
@@ Line 117: / Line 117: @@
 # Press ''Pick Object and Render Maps'' and select the viewpoint object.
-The six rendered bitmaps will automatically be loaded into the Reflect/Refect map, or you can convert them into a DDS cubemap with <code><nowiki>Dxtex</nowiki></code> or another tool.
+The six rendered bitmaps will automatically be loaded into the Reflect/Refect map, or you can convert them into a DDS cubemap with Dxtex or another tool.
 Warning: The render cannot be canceled once the object is picked, so save your Max file before rendering, in case Max freezes!
 === DxTex ===