Hi Roshan, Roshan Shariff writes: > I can confirm this bug with dvipng --- with the "-bg Transparent" > option, dvipng ignores the background color from the input tex file, > whereas without that option it always produces an opaque background. > There's currently no way to dynamically change command line > parameters, so I'm not sure how to solve this problem while supporting > both use cases. I asked about this behaviour on the dvipng mailing list, and the maintainer doesn't consider it a bug, see https://lists.nongnu.org/archive/html/dvipng/2021-05/msg00002.html. Can you explain the use for a `Transparent` background ? Transparent images are poorly supported in emacs, all it does is render it with the background color of the default face -- which may not be the expected result. Regards, -- Sébastien Miquel > On Wed, Apr 7, 2021 at 1:38 PM Sébastien Miquel > wrote: >> To reproduce with `emacs -Q` : >> - Open an org buffer >> - Call ~(setq org-format-latex-options '(:foreground default >> :background "Black" :matchers ("$")))~ >> - Call =C-c C-x C-l= (org-latex-preview) on a latex fragment such as >> $abc$ >> >> This bug was introduced by the commit 2f9e1569f which adds the option >> `-bg Transparent` to the arguments of `dvipng`. According to its >> manual, this option should be ignored if a background is already set, >> but it doesn't seem to be. Perhaps org should set it differently. >> >> -- >> Sébastien Miquel