ImageEngine/cortex — pull request #336 by davidsminor (2014-09-18 17:50:16+00:00)
Title: SceneCache::hash() uses file name where available

SceneCache::hash() used to use a memory address. Ideally you'd want this method to give a stable result across different processes, so now we use the file name if we're reading a scene cache from a file, and fall back to a memory address if we're using something like a MemoryIndexedIO.