BuilderTools fixer is actually pretty messy and the BLOCK_FIX_DATA needs to be generated by a script.
The thing is that this script was not up to date and a lot of blocks were missing or even wrong. So I took a little bit of time on it and by reading matcracker/BlocksConverter repo I pretty much convert their list in the script.
I was able to do a more complete list of incorrect block while converting from java to bedrock.
I tried it myself on a 1.12.2 WorldPainter generated map (and a vanilla solo map too) but I can't assure you a 100% accuracy, I didn't tried EVERY block. At least it does not seems to be really bad actually.
The 100% safe thing I can tell you is that it's already like 10x better than the old one.
BuilderTools fixer is actually pretty messy and the BLOCK_FIX_DATA needs to be generated by a script.
The thing is that this script was not up to date and a lot of blocks were missing or even wrong. So I took a little bit of time on it and by reading matcracker/BlocksConverter repo I pretty much convert their list in the script. I was able to do a more complete list of incorrect block while converting from java to bedrock.
I tried it myself on a 1.12.2 WorldPainter generated map (and a vanilla solo map too) but I can't assure you a 100% accuracy, I didn't tried EVERY block. At least it does not seems to be really bad actually. The 100% safe thing I can tell you is that it's already like 10x better than the old one.