I changed a few images and svn diff --force it but uploading that resulted in a unhanded exception on differential
I don’t know the answer, but which repository is this? The prebuild libs are svn, but the rest is git I think? Maybe you should use git?
Just guessing here though…
If your patch includes changes to or additional images, simply attach them when you are creating the revision.
https://docs.blender.org/manual/en/dev/about/contribute/patch_commit.html