Q3 had this from the start, defaulted it enabled (s_loadas8bit 1 / s_compression 1 would use this) and had significant memory/performance differences. It was gutted out in some 1.30+ version with no trace in the released source nor the released sources of RTCW and JK2.
Reimplementing this might take some work.
FUN FACT: the 4-bit ADPCM painting is still in the code (what used to be s_compression 2) but that's generally slower, but had larger memory savings.
Q3 had this from the start, defaulted it enabled (s_loadas8bit 1 / s_compression 1 would use this) and had significant memory/performance differences. It was gutted out in some 1.30+ version with no trace in the released source nor the released sources of RTCW and JK2.
Reimplementing this might take some work.
FUN FACT: the 4-bit ADPCM painting is still in the code (what used to be s_compression 2) but that's generally slower, but had larger memory savings.