This reverts commit 5d36e382c7.
It's been found to cause all kinds of terrain glitches on Windows and
Linux. Please do not try experimental image compression alternatives
without discussing and reviewing first.
(not commiting any files that were reported as broken, there are many!)
Original size: 130846 KiB on 10530 files
Optimized size: 127520 KiB
Total saving: 3325 KiB = 2% decrease
NOTE: Extremely many files received (smaller) changes but due to the
extremely large amount of changes I am not 100% sure that this
conversion is correct. This is the output of
utils/png_format_check.sh:
RGBA: 10247 RGB: 10 Gray+A: 256 Gray: 0 Index+A: 0 Index: 0 Other: 0
Overall statistics (only for files with a smaller recompressed size):
Original size: 128949 KiB on 9778 files
Optimized size: 125813 KiB
Total saving: 3135 KiB = 2% decrease
Overall statistics (only for files with a smaller recompressed size):
Original size: 2433 KiB on 194 files
Optimized size: 1968 KiB
Total saving: 464 KiB = 19% decrease
Overall statistics (only for files with a smaller recompressed size):
Original size: 735 KiB on 90 files
Optimized size: 482 KiB
Total saving: 253 KiB = 34% decrease
Overall statistics (only for files with a smaller recompressed size):
Original size: 71209 KiB on 4533 files
Optimized size: 64830 KiB
Total saving: 6379 KiB = 8% decrease
