QualityComparison

S2TC Quality Comparison

This page compares compression quality of S2TC at different settings versus other methods to get similar file size on various example images.

Note that these pictures are smaller sections of larger test images. You can obtain the actual test images by running test.sh in the tests subdirectory of the source distribution.

When S2TC was used, the values of the EnvironmentVariables are given in the caption; the variable S2TC_DITHER_MODE not mentioned here was always set to SIMPLE.

dxtfail (test picture)

An evil test picture by me.

fract001 (test picture)

Made with Fractint :)

noise (test picture)

Some uniform noise.

noise_solid (test picture)

Solid noise made with GIMP.

supernova (test picture)

GIMP's supernova.

ba_grass_cc (game texture)

A grass texture from Sauerbraten.

base_concrete1a (game texture)

A concrete texture from Xonotic.

disabled (game texture)

A screen texture from Xonotic.

floor_tread01_norm (game texture)

A normal map from Xonotic.

lift02 (game texture)

A lift texture from Xonotic.

sunset (game texture)

A sky texture from Xonotic.

amelia (misc)

A standard anime face, as S3TC is generally said to be bad for such stuff.

Xonotic In-Game Scenes

The following four pictures are the same in-game scene of Xonotic:

Uncompressed (reference)

All textures compressed by the NVidia graphics driver

All textures compressed with S2TC Fast (WAVG, -1, ALWAYS)

All textures scaled down by factor 2

OpenArena In-Game Scenes

The following four pictures are the same in-game scene of OpenArena:

Uncompressed (reference)

All textures compressed by the NVidia graphics driver

All textures compressed with S2TC Good (SRGB_MIXED, 32, LOOP)

All textures compressed with S2TC Fast (WAVG, -1, ALWAYS)

All textures scaled down by factor 2