Ancestor Ghost death does not play correctly

Morrowind.exe: https://streamable.com/qk8gk7

OpenMW: https://streamable.com/j8nf3u

In addition to the already known transparency differences in OpenMW (see #4954), this ghost's death animation doesn't change transparency as it should, and its particle effects on death are colored incorrectly. The ash pile it leaves behind appears to fade in as well, though somewhat stilted, in the vanilla engine.