Twistyforestfiresyou can change the behaviour of the flying embers so they fade out after they contact with a surfaceAny idea how I would do that?
Assuming he's talking about editing the particle itself, the quickest way would be to launch the game with -tools and use the particle editor. however if you have SFM installed using SFM's particle editor is more convenient imo. The properties of each particle are fairly easy to understand so you shouldn't have any issues fixing it.
However its probably worth going with what wiethoofd said, although I'm not sure why you want to use frame blending in all honesty.