Posts that have the main focus on the background should be posted in /r/moescape. Here's /u/eagleshadow, a /r/moescape moderator, explaining what he thinks of where the divide should be:

It's too character centric. There are some sunflowers but that's it for the environment, not that much of it when you think about it. Character takes up like 70% of the image. Moescape images can have character take up to and over 50% of the screen, but only if somehow environment is focus of the image (say character with their back turned, or looking at the environment), or if focus is 50-50, though then it already becomes borderline, like this image, though this one is leaning on the wrong side of the border since it has both little environment and is character-focused. If if was posted to moescape and someone reported it I wouldn't think twice about removing it and redirecting the poster to awwnime/patchuu/twodeeart, though I wouldn't remove it if it weren't reported as we hardly ever do that.
The point of such "strict" definitions of apropriateness, is to reduce content overlap and xposts between awwnime/pantsu/moescape/patchuu/twodeeart, so that people can use their multireddits/front-pages more comfortably, and have less trouble deciding where to post which image.

https://www.reddit.com/r/Patchuu/comments/3g6kwe/kazami_yuuka_touhou/ctvv44v/

Reporting submissions that don't belong in /r/moescape and x-posting them here is highly encouraged.

Rules:

1) www.reddit.com/rules

2) No ad hominem attacks or threats

3) All submissions must relate to the topic of the sub

4) Please append [Franchise Name] or [Original] to your titles, [Original] meaning the image features no known franchise.

Related subs:

/r/moescape

/r/awwnimate

/r/JustMoeThings

/r/animeanarchy