PLAYTEX AI KTX2 guide evidence
Captured: 2026-08-29 (America/Chicago)
Tool: Khronos ktxinfo v4.4.2
Source SHA-256: 8363034fd5cdb59e947388968ef8f1d07fd699d36fbca872428eb3549567de47
KTX2 SHA-256: 1d83d52f7807d9f8e5e5e453bb2ceab25223d4694f9ed9cbab074e06c7334e34

Header

identifier: «KTX 20»\r\n\x1A\n
vkFormat: VK_FORMAT_UNDEFINED
typeSize: 1
pixelWidth: 512
pixelHeight: 512
pixelDepth: 0
layerCount: 0
faceCount: 1
levelCount: 10
supercompressionScheme: KTX_SS_BASIS_LZ
dataFormatDescriptor.byteOffset: 0x140
dataFormatDescriptor.byteLength: 44
keyValueData.byteOffset: 0x16c
keyValueData.byteLength: 108
supercompressionGlobalData.byteOffset: 0x1d8
supercompressionGlobalData.byteLength: 6823

Data Format Descriptor

DFD total bytes: 44
Vendor ID: KHR_DF_VENDORID_KHRONOS
Descriptor type: KHR_DF_KHR_DESCRIPTORTYPE_BASICFORMAT
Version: KHR_DF_VERSIONNUMBER_1_3
Descriptor block size: 40
Flags: 0x0 (KHR_DF_FLAG_ALPHA_STRAIGHT)
Transfer: KHR_DF_TRANSFER_SRGB
Primaries: KHR_DF_PRIMARIES_BT709
Model: KHR_DF_MODEL_ETC1S
Dimensions: 4, 4, 1, 1
Plane bytes: 8, 0, 0, 0, 0, 0, 0, 0
Channel Type: KHR_DF_CHANNEL_ETC1S_RGB

Key/Value Data

KTXorientation: rd
KTXwriter: toktx v4.4.2 / libktx v4.4.2
KTXwriterScParams: --encode etc1s

Measured file size: 32,755 bytes

Command:
toktx --encode etc1s --genmipmap --assign_oetf srgb --threads 4 playtex-brick-albedo-etc1s.ktx2 brick-albedo.png

Limitation: This is one source and encoder setup. File size is measured; visual quality is not ranked by this output.