Ground scars for EMP

[GoogleFrog]

Now that we can add per-weapon ground scars, we could add some for EMP. I'm thinking some sort of subtle lightning-scorch effect, probably with initial glow matching the colour of the EMP or disarm. Something with elements of current-through-wood patterns.

The main units would be:

• Shockley
• Thunderbird
• Imp

I think it is particularly sad that a Thunderbird run doesn't leave a record of its path. Scars for spammed weapons (Venom and Faraday) might get a bit noisy, but can be investigated.