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--- high-resolution_texture [2006-07-23 12:13] – skyjake
+++ high-resolution_texture [2009-08-13 15:07] (current) – Robot: Changing Category:Map Author's Guide dewbot
@@ Line 1: / Line 1: @@
+Normal [[graphic_patch]]es, [[wall_texture]]s and [[flat]]s can be replaced with [[tga]] (Truevision Targa),
+[[png]] (Portable Network Graphics) or [[pcx]] (Zsoft Paintbrush) images. The resolution of these external images can be higher than the resolution of the original graphics.
+====== Supported image file formats ======
+The engine currently supports these image formats:
+^ Pixel depth^ PCX^ PNG^ TGA |
+| 8-bit (paletted)<sup>(1)</sup>| Yes| Yes| — |
+| 16-bit| —| —| — |
+| 24-bit| —| Yes| Yes<sup>(2)</sup> |
+| 32-bit ([[alpha_channel]])| —| Yes| Yes<sup>(2)</sup> |
+Notes:
+  -  The palette does not have to match the palette of the game.
+  -  TGAs must be type 2 (uncompressed, unmapped RGB).
+Note that 32-bit images are just 24-bit images with an additional 8 bits
+per pixel for the [[alpha_channel]].
+The recommended format for high-resolution textures is paletted
+[[png]]. It is the easiest format in which to distribute the textures due
+to its small size. Since the palette doesn't have to be the same as
+the game's, it should be enough for many textures.
+====== Visible size ======
+The high-resolution textures can be of any size. The engine will
+render them scaled so that they fit the size of the original
+texture. This means the aspect ratio of the new texture doesn't have
+to be the same as of the original texture. Note that the engine will
+have to resize all textures so that their dimensions are powers of two
+(e.g. 32, 64, 128, 256). This means TGA/PNG textures whose width and
+height are already powers of two can be loaded faster.
+====== Transparency ======
+Color keying is done if the file name of the image ends in "-ck", for
+example **brnbigc-ck.png**. Both cyan (0,255,255) and purple
+(255,0,255) are used as key colors.
+An alternative way to have transparency
+is to use an alpha channel. In it, white (255) means opaque and black
+(0) is fully transparent. All values in between can be used, too, for
+partly translucent pixels. When using an alpha channel, the "-ck"
+suffix is not needed.
+====== Example: Replacing a wall texture ======
+To create a high-resolution texture for the wall texture STARTAN3
+you'd place a TGA file named **STARTAN3.tga** or a PNG file named
+**STARTAN3.png** into the **Textures** directory.
+====== Flats ======
+The file names of images that replace [[flat]]s must begin with "Flat-",
+e.g. to replace the flat FLOOR7_2 you'd need to have a TGA file
+**Flat-FLOOR7_2.tga** in the **Textures** directory. If there
+are both [[png]] and [[tga]] versions of the same texture, the engine will use
+the [[png]] version.
+[[version_1_8.6]] added the **Flats** external [[resource_category]].  In
+order to replace FLOOR7_2, it is enough to put **FLOOR7_2.png**
+into the **Flats** directory; no prefix is necessary.
+ **Note:** The file names of high-resolution textures must match the [[texture]] names, not the names of the [[patch]]es that make up the textures. For example: DOOR2_5 is a patch name, DOOR3 is the texture that uses DOOR2_5.
+====== Command line options ======
+To disable high-resolution textures use the command line option
+//-nohightex//. The option //-texdir// can be used to change the
+directory from which the textures are searched.
+====== See also ======
+  *  [[addons]]

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