1. CSE4MOD Textures and Materials Paul Taylor 2009

2. Texturing in 2k4 From now on we will consider Textures to be the image that is used for painting the objects When it is applied to a BSP the texture, it is used as a Material

3. Texture Formats Powers of 2 from 32 up to 2048 (now 4096 I believe) Formats – DirectX Texture Compression (DXTC) 1 – Fails on older Nvidia hardware - 1 bit alpha 3 – 4-bit Alpha 5 – 4-bit interpolated alpha – 8-bit palettized (P8) (256 colour) Used in U and UT they can save 75% of disk and ram usage whilst retaining up to 100% of detail – 32-bit RGBA textures Big, Fat and Beautiful – 8bit alpha – 8-bit and 16-bit greyscale heightmaps.

4. Texture Properties

5. F is for Fallback This shows the most basic version of a texture – Used when UT is running on economy hardware

6. The Checkerboard This places a coloured checkerboard behind your texture – This guy is for Alpha testing!

7. Layer-Looking This guy toggles showing the layer you are working on, or the overall view of the material

8. Geometry Wrapping These three allow you to test your material on different surfaces You can drag the 3D views using: – Left mouse for Z – Right mouse for Z and Y Use alt to rotate around the Y axis

9. The Texture Properties

10. Animation – AnimNext – MaxFrameRate – MinFrameRate – PrimeCount Pre render cycles

11. The Texture Properties Material – Fallback – SurfaceType Sets the surface type which is referenced by the engine for effects

12. The Texture Properties Surface – bAlphaTexture Disable/Enable the alpha filter – bMasked The cheap version of alpha blending – bTwoSided Useful for sheet polygons Texture TextureFormat

13. The Texture Properties Texture – Detail A greyscale texture that is faded in as you approach the material – Keeping the average of this texture to ~127 will keep the brightness from changing Used for wood-grain effects as a micro texture, or rock crevice effects as a macro texture (to reduce tiling effect) – DetailScale 8 or above for a Macro Texture, 0.25 or smaller for a micro texture – LODSet This helps the engine decide on the detail levels and mipmaps to use, based on the user settings – NormalLOD This is the ‘normal’ level of detail for your texture. Basically how many Mip levels are skipped. Unknown if it is the first ones, or just some!

14. LOD Values -4 UltraHigh -3 VeryHigh -2 High -1 Higher 0 Normal +1 Lower +2 Low +3 VeryLow +4 UltraLow

15. The Texture Properties Texture – Palette Used for 8-bit textures. I’ve never used it! – Uclamp Used for Scripted Textures, useless on a normal texture – UClampMode Sets the wrapping mode of the texture to TC_Wrap or TC_Clamp – Clamp will stretch the last pixels across the screen! (Alpha) – Vclamp As above – VClampMode As above

16. http://udn.epicgames.com/Two/ProjectorText ures.html

17. The Texture Properties TextureFormat – DXT1 – DXT3 – DXT5 – AGBR – 8BIT You can compress a 32bit image to DXT 1/3/5 with the Compress option when you right click a texture in UnrealEd

18. Now you know everything important about textures It’s time to start creating materials!

19. Shaders Shaders are materials that apply effects to your surface These include things such as: Secular Lighting Diffuse Lighting Self Illumination

20. Creating a Shader Texture Browser File->New

21. Red stubs are at default settings

22. Each Stub can use either an existing texture, or a new material

23. Modifiers

24. Environment Maps

25. Scripted Textures

26. References http://www.warp2search.net/contentteller/ne ws_story/nv30_to_unlock_advanced_graphic_ features_in_unreal_tournament_2003.html http://www.warp2search.net/contentteller/ne ws_story/nv30_to_unlock_advanced_graphic_ features_in_unreal_tournament_2003.html http://www.oldunreal.com/editing/s3tc/Unre al%20Textures.doc http://www.oldunreal.com/editing/s3tc/Unre al%20Textures.doc http://udn.epicgames.com/Two/TextureSpecif ications.html http://udn.epicgames.com/Two/TextureSpecif ications.html