covaithe
Explorer
I feel reasonably confident that, in publishing our own themes, we wouldn't fall afoul of any IP-related legal BS that we don't already infringe with backgrounds. No one has ever suggested that those are problematic.
I say this as someone who doesn't currently subscribe to DDI, and has no idea at all what a theme is, mechanically.
I say this as someone who doesn't currently subscribe to DDI, and has no idea at all what a theme is, mechanically.