Hey Eric,
I’ve also had this problem on previous versions of the engine and now on 4.7 (preview 5). As suggested I deleted the saved and intermediate folders but the majority of post process effects don’t seem to be working (vignette for example). Infact the only one I can see working is DoF.
I might be wrong but I think on 4.6 this was an issue if you had Mobile HDR disabled, and effects wouldn’t work in the editor. Regardless of settings I now can’t solve the problem. Any thoughts?
Cheers,
Paul.