(#37) Elemental materials that were remade.
(#37) EffectsCave material functions.
(#37) EffectsCave brick material assets.
(37) EffectsCave modified emissive material assets.
(#37) EffectsCave ground material assets.
(#37) Effects Cave ice material assets.
(#37) EffectsCave misc material assets.
(#37) EffectsCave rock material assets.
(#37) EffectsCave warspoil material assets.
(#37) EffectsCave dust material assets.
(#37) EffectsCave effects:fire material assets.
(#37) EffectsCave effects:flare material assets.
(#37) EffectsCave effects:snow material assets.
(#37) EffectsCave effects:sparks material assets.
(#37) EffectsCave effects:water material assets.
Merge pull request #38 from opiepj/bugfix/37-cave-placeholder-mats

Bugfix/37 cave placeholder mats