Extreme textures

VanKurt · 2003-05-08T01:43:33

Today I wondered if it is possible to use textures of EXTREME sizes (8192x8192 or more)? 1) Would it be better to use a single file or split it up into smaller pieces? 2) What fileformats (compression?) would be suitable? 3) How would I load these textures (Compression with S3TC?) ? 4) Would mipmapping be possible? 5) Can graphic cards handle these things? ( I remember that my old Vodoo2 was limited to 256x256 or something ;-) )

Graphics and GPU Programming Programming

Started by VanKurt May 06, 2003 02:58 PM

14 comments, last by VanKurt 20 years, 11 months ago

noVum

170

May 07, 2003 11:17 AM

quote:Original post by VanKurt
Well, 4096 is the standard size of my terrain-textures. But I took a look at Battlefield1942''s textures:
They use 8192 maps split up into 64 1024 textures. So I guess they have to use some kind of compression (S3TC?), because 192 MB +Mipmaps are a little to much... ;-)

I''ve also noticed that they store their textures in an intersesting way: A 1024x1024 texture is stored WITH mipmaps and is only 7XX KB big!
(The fileformat is .dds)
Does anyone know how that is possible?

.dds = DirectX texture file... that means they use DXT1/3 or 5

_Madman_

100

May 07, 2003 11:23 AM

AF-Anisotropic Filtering

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VanKurt

133

Author

May 07, 2003 03:54 PM

Is DXt1/3/5 Direct X only? I thought you could use it in OpenGL, too?

Jallen

122

May 07, 2003 04:01 PM

You can use DXT1/3/5 texture formats in OpenGL. See the ARB_texture_compression and EXT_texture_compression_s3tc extension specs.

If you want a DDS loader for OpenGL, you can find one here:

http://cvs1.nvidia.com/DEMOS/OpenGL/inc/shared/nv_dds.h
http://cvs1.nvidia.com/DEMOS/OpenGL/src/shared/nv_dds.cpp

---I write code.DelphiGL (http://delphigl.cfxweb.net)

Raduprv

997

May 07, 2003 04:46 PM

Why would you need a 8192x8192 texture, in the first place?

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VanKurt

133

Author

May 08, 2003 01:43 AM

because it gives SO much detail to my landscape!