# Download the gospel wget https://imagemagick.org/archive/ImageMagick-7.1.1-15.tar.gz tar xvzf ImageMagick-7.1.1-15.tar.gz cd ImageMagick-7.1.1-15
Check that the correct version is installed.
The memory reduction from -10 to -15 comes from the new MagickResource cleanup functions—they finally fixed the ClonePixelCache memory leak that haunted long-running daemons.
Enabled by default in version 7, HDRI uses floating-point values to store pixel components. This eliminates rounding errors during multi-step, complex color operations.