OBD:TXMP

Main Page >> Oni Binary Data >> File types >> TXMP

<== TXMP : Texture Map ==>
General file

Raw hex	Translation	Meaning
01 1F 00 00	31	00031-rl_1.TXMP
01 00 00 06	3	level 3
rl_1		name of the texture
00	0	MIP-mapping option; the following options are possible: 00 - off 01 - on
10	16	color depth (= 16 bits)
00 00	0	unknown (blank filler?)
80 00	128	width (= 128 pixels)
80 00	128	height (= 128 pixels)
01 00 00 00	1	store type = 1 (uncompressed, without alpha blending)
00 00 00 00	not used	link to a TXAN file; only used if the texture is the first pic of a texture animation
00 00 00 00	not used	link to a TXMP file; only used in connection with vertex shading effects
20 00 00 00	32	address at which the texture is stored in the raw file (on PC; null on Mac and PC demo)
00 00 00 00	0	address at which the texture is stored in the sep file (on Mac and PC demo; null on PC)
AD DE	dead	not used

MIP mapping (MIP stands for "multum in parvo")

A texture mapping technique that uses multiple texture maps, or MIP maps. Each MIP map is half the size of the first one, providing several texture maps for various levels of depth.

Alpha blending

In computer graphics, the combining of the alpha channel with other layers in an image in order to show translucency.

The alpha channel is an additional eight bits used with each pixel in a 32-bit graphics system that can represent 256 levels of translucency.

(here, the base color depth is 16 bits; and there are only 4 bits for the alpha channel, so only 16 levels of transparency. geyser)

You can edit the raw/sep file manually (although we recommend Oni Un/Packer) : there's a tutorial here

Option	Value	Meaning
MIP-mapping types	00	off
	01	on
	11	unknown
	1C	unknown (used for skyboxes, works with 00 too)
Color depths	10	16 bit
	12	16 bit + shade vertex
	14	16 bit + 4 bits for the alpha channel
	20	32 bit
Store types	00	uncompressed, with alpha blending
	01	uncompressed, without alpha blending
	02	unknown
	03	unknown
	08	32 bit uncompressed (used for skyboxes)
	09	compressed
	0A	unknown
	0B	unknown

Below you can see the pictures for this example. The first picture shows how its stored in Oni, the second how you'll see it in the game.

Pixel arrangement

how it's stored	how you'll see it

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<== TXMP : Texture Map ==>

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Main Page >> Oni Binary Data >> File types >> TXMP