I just upgraded my command line utilities from the following version:
PVRTexTool Version 3.20
SDK Build: 2.08.28.0607
PVRTC Version 188.8.131.52
To the version:
PVRTexTool Version 3.23
SDK Build: 2.09.29.0677
The 3.23 version produce lot of artefacts on semi-transparents pixels. Those artefacts were not present with the 3.20 version.
Also, it seems those artefact aren’t present with the GUI version.
Here is the command line options i use:
PVRTexTool.exe -fOGLPVRTC4 -o"outpu.pvr" -q5 -yflip0 -i"input.png";
Is it a known bug? Or a misuse?
For semi-transparent textures there should be no differences with that version of PVRTexTool - could you send me a copy of your texture to email@example.com? If I can have a look at it I should be able to figure out what’s going on.
Fully/near-fully transparent pixels may show issues, as the new compressor will automatically bleed the texture into these regions as an optimisation step, but semi-transparent pixels should remain unaffected.
You should receive the mail soon.