Check your knowledge
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What is the main difference between real-time compression schemes like ASTC and traditional compression schemes like JPG and PNG?
Real-time compression schemes like ASTC allow efficient random sampling of elements within a larger image. JPG and PNG are only designed to decompress the entire image.
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ASTC provides a wide choice of bit rates when compressing images. What are the upper and lower bounds of this range?
ASTC provides bit rates between 0.89 bits and 8 bits per texel (bpt), corresponding to block sizes of 4x4 texels to 12x12 texels.
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ASTC uses color gradients, or partitions, to assign the color values of each texel. What is the maximum number of partitions that a block can define?
ASTC allows a block to define up to four distinct partitions.
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Which astcenc command-line option would you use to compress an input texture where each channel contains entirely unrelated content?
The
-maskoption.