在国外看到一教程。。。精彩得很，转帖让大家看看。。。
这篇文章是介绍如何制作视差映射贴图，有兴趣的童鞋大家过来看看。。。原文地址：http://wiki.crymod.com/index.php/Creating_Parallax_Occlusion_Map_(POM)_Textures
About
AuthorSkyplass
Skill LevelAdvanced
CompatibilityAll
RequirementsPhotoshop, CryTif Plugin from the ModSDK,
Nvidia DDS Plugin, Sandbox2, CrazyBump
Date Added26/07/2009
Last Modified26/06/2010
Contents [hide]
[*]1 Introduction[*]2 Tutorial[*]2.1 Displacement & Normal maps[*]2.2 Saving to .dds[*]2.3 Editing in CrazyBump[*]2.4 Saving to CryTif[*]2.4.1 Note[*]2.5 Creating the .mtl file[*]2.6 Final steps
IntroductionThe following tutorial guides you through the process of creating a Parallax Occlusion Map, for use in CryEngine levels.
TutorialWe will use a standard (But resized to a size of 512x512) Crysis texture as an example.http://wiki.crymod.com/images/thumb/5/5b/Pomtut1.jpg/500px-Pomtut1.jpg
Displacement & Normal mapsOpen the texture file in Crazybump and create displacement and normal maps. Save them to a place you will remember.
Saving to .ddsOpen up the texture file (in this case the crysis example given above) And save it as a .dds, using the Nvidia dds Plugin with the following settings.http://wiki.crymod.com/images/thumb/8/85/Pomtut.jpg/500px-Pomtut.jpg
Editing in CrazyBumpOpen both the normal map and displacement map we created using CrazyBump. In the Displacement file window, select everything (Ctrl/Strg+ A) and copy it (Ctrl/Strg+C). Next, select alpha channel layer of the normal map and paste into here (Ctrl/Strg+V).
Saving to CryTifYou now need to save this file as in CryTif format, using the photoshop plugin (Installation Instructions) with the following settings.http://wiki.crymod.com/images/thumb/0/03/Pomtut3.jpg/500px-Pomtut3.jpg
NoteDue to a bug in the CryTif plugin, the generated bumpmap texture file may be unreadable by the sandbox. To solve this, simply regenerate it until the Sandbox recognizes it. Also, remember: If you change the bumpmap, the bump info is lost. To fix this problem, save your work and restart the editor.
Creating the .mtl fileOpen notepad and paste the following text in, and remember to write your texture filename where indicated below:<Material MtlFlags="45" Shader="Terrain.Layer" GenMask="402657284" SurfaceType="Test" Diffuse="1,1,1" Specular="0,0,0" Emissive="0,0,0" Shininess="10" Opacity="1"> <Textures> <Texture Map="Diffuse" File="textures/terrain/detail/YOUR_DIFFUSE_TEXTURE_FILENAME_HERE.dds" > <TexMod TileU="0.5" TileV="0.5"/> </Texture> <Texture Map="Bumpmap" File="textures/terrain/detail/YOUR_NORMAL_MAP_FILENAME_HERE.tif"> <TexMod TileU="0.5" TileV="0.5"/> </Texture> </Textures> <MaterialLayers /> </Material>Then save it as a .mtl file, and put it in the Game\Materials\Terrain directory (If any of these folders do not exist, create them)
Final stepsCopy/Move both The diffuse (file you started off with(.dds format)) andd your Normal Map (.tif format) to the Game\textures\terrain\detail folder (Again, if folders do not exist create them).Set the mtl you made in step 4 as the surface type for one of your texture layers, You should now be able to paint POM textures!http://wiki.crymod.com/images/thumb/8/80/Pomtutfinished.jpg/500px-Pomtutfinished.jpg
PS：这篇文章暂时只能让看得懂E文的人士看，到时候俺才做一下翻译。。。
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