Texture is an image that is used to fill faces to add details to them. In most cases textures are just 2D images, however there are some exclusions to that - for example cube maps, that may be used for environment mapping. Fyrox supports 1D, 2D, 3D and Cube textures.

Supported formats

To load images and decode them, Fyrox uses image and ddsfile crates. Here is the list of supported formats: png, tga, bmp, dds, jpg, gif, tiff, dds.

Compressed textures

Fyrox supports most commonly used formats of compressed textures: DXT1, DXT3, DXT5. Such textures can be loaded only from DDS files. You can specify on-demand texture compression in import options (see below), it works for every texture format except DDS. It is meant to be used when you don't want to bother with DDS format, there are two compression methods:

  • Quality - has 4:1 compression ratio, supports full 8-bit alpha channel. Textures with gradients will most likely suffer from noticeable banding.
  • Speed - has lower quality compared to Quality mode, but it has 8:1 compression ratio for texture without alpha channel and 6:1 with alpha channel. Keep in mind, that alpha channel in this mode supports only 1 bit - it is either enabled or not.

Compressed textures usually does not support color gradient very well, if you have a texture with a lot of colors and gradients, then you'll most likely get compressed texture with lots of graphical artifacts such as banding.

It is also worth mentioning, that you should never use compression with normal maps, it can significantly distort normals because normal maps usually have lots of color gradients.

Import options

It is possible to define custom import options. Using import options you could set desired compression quality, filtering, wrapping, etc. Import options should be defined using Asset Browser in the editor:

texture import

It is also possible to define import options manually in a separate file with the same name as the source texture, but with additional extension options, this is what the editor does for you. For example, you have a foo.jpg texture, a file with import options should be called foo.jpg.options. Its content may look something like this:

    minification_filter: Linear,
    magnification_filter: Linear,
    s_wrap_mode: Repeat,
    t_wrap_mode: ClampToEdge,
    anisotropy: 8.0,
    compression: NoCompression,    

Even if it is possible to modify it by hand, it is strongly advised to use the editor to edit import options, because it reduces chances of messing up.

Render target

Texture can be used as a render target to render a scene in it. To do this you should use new_render_target method and pass its result to scene's render target property. Renderer will automatically provide you info about metrics of texture, but it won't give you access to pixels of render target.