Comment 7 for bug 679035

Yes the existing hugin behaviour is correct regarding the TEMPDIR environment variable, all temporary intermediate files are created in TEMPDIR.

The problem as I understand it is that the hugin Tempdir preference should override this and it doesn't.

This is separate to TEMPDIR being set in the .pto.mk files, this only effects the behaviour of enblend when it runs out of memory, and is set properly as far as I know.