Multipass postprocess

Hi,
Is there way to render some postprocess to render target, and use it as input in next postprocess ? Or is there any other way to use result of one post process in another as input ?

For example I want to:

  1. Render some outlines to render target
  2. Blur these outlines from (1)
  3. Apply outlines from (2) to screen

Multi pass PP is impossible to do in blueprints alone, and requires a bit of coding.