What is DXT3?
What is DXT3?
The DXT3 format is an RGBA format. Each 4×4 block takes up 128 bits of data. Thus, compared to a 32-bit RGBA texture, it offers 4:1 compression. The alpha values are stored as 4-bit-per-pixel alpha values. The alpha values are stored in row-major order, from the highest bit of the 64-bit unsigned integer.
What is DXT1?
DXT1 (also known as Block Compression 1 or BC1) is the smallest variation of S3TC, storing 16 input pixels in 64 bits of output, consisting of two 16-bit RGB 5:6:5 color values and. , and a 4×4 two-bit lookup table.
What is DXT 5?
DXT5 format compresses textures to 8 bits per pixel, and is widely supported on PC, console and Windows Phone platforms. It is a good format to compress most of RGBA textures. For RGB (without alpha) textures, DXT1 is better.
What are DXT textures?
DXT is a texture compression format, formerly known as S3TC. DXT is widely supported on current graphics hardware, meaning it will stay compressed in video memory, allowing the artist to use more or larger textures. There are five DXT formats: DXT1, DXT2, DXT3, DXT4, and DXT5.
How do I convert DDS to JPG?
How to convert DDS to JPG
- Upload dds-file(s) Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.
- Choose “to jpg” Choose jpg or any other format you need as a result (more than 200 formats supported)
- Download your jpg.
Are DDS files compressed?
DDS files use ‘lossy’ compression which means that you will lose detail and color information compared to your original texture. Lumion 6.5 and newer support . DDS BC7 format which is compressed at a ratio of 1:4 in the graphics card memory. Despite the compression, the quality is still excellent.
What is block compression?
Block compression is a texture compression technique for reducing texture size. When compared to a texture with 32-bits per color, a block-compressed texture can be up to 75 percent smaller. Applications usually see a performance increase when using block compression because of the smaller memory footprint.
What is a .DDS file?
The DirectDraw Surface container file format (uses the filename extension DDS), is a Microsoft format for storing data compressed with the previously proprietary S3 Texture Compression (S3TC) algorithm, which can be decompressed in hardware by GPUs. The file extension for this data format is ‘.
What is crunch compression unity?
Crunch compression helps to reduce the size of the textures in order to use less disk space and to speed up downloads. But more importantly, the updated library is now capable of compressing ETC_RGB4 and ETC2_RGBA8 textures, which makes it possible to use Crunch compression on iOS and Android devices.
What is DXT medical?
DXT. deep X-ray therapy.
What is a DDS texture?
A DDS file is a raster image saved in the DirectDraw Surface (DDS) container format. It can store compressed and uncompressed pixel formats DDS files are often used for texturing video game unit models, but may also be used to store digital photos and Windows desktop backgrounds.
What programs can open DDS files?
You can open DDS files with various image editors, including XnViewMP (multiplatform), Windows Texture Viewer (Windows), dotPDN paint.net (Windows), and Apple Preview (included with macOS). You can also view DDS images with GIMP (multiplatform), IrfanView (Windows), and Adobe Photoshop with specific plugins.
How are the colors stored in DXT3 format?
The colour information in DXT3 is saved similar to the DXT1 format without an alpha channel. So a palette of 4 colours is used to represent 16 pixels of the texture. But the alpha information is stored with 4 bit in the DXT3 format.
What’s the difference between DXT3 and DXT5?
The DXT5 formats differs from the DXT3 format in the way the alpha information is saved. The colour information is stored in the same way. For the alpha information it uses a palette, similar to the way the colour information is also stored.
What kind of alpha channel does DXT5 support?
DXT5 support a four-bit interpolated alpha channel. Three bits are used to determine explicit alpha values, and two eight-bit values are used to interpolate gradually between them. This makes the format especially suited for soft gradients and other textures where the alpha areas vary less wildly.
What is the compression ratio in DXT3 format?
But the alpha information is stored with 4 bit in the DXT3 format. That means that in total 128 bit are used for the 16 pixels (32 for the palette, 32 for the colour indices and 64 for the alpha information). So this results in a compression ratio of 1:4.