My son! what happened back there? mama Ralle will slap us both!
just for the heads up, a Melee map is more on terrain, strategic implementation, and game difficulty, no triggers needed. Because its a melee.
Just as Lord Septimus' tutorial:
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Melee map is a genre where player choose one of the four race (Human, Orc, Undead or Night Elf) and combat with another player till victory was achieve by destroying every single structure belong to the foes.
Melee map is a map that involves editing of terrain and placement of neutral structure and creep. It was a map that does not involves any editing of object editor or import of custom material.
However, there is often an dispute involving custom material being permitted to be used for melee map genre if it was meant for <span style="font-size: 18px">destructible/doodad object</span> in order to enchances the terrain and not to be used to create custom unit/races.
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But as time improves, I somehow approve the little customization of some melees(creeps, replace model of neutral building, items), but still it doesn't harm the whole nature of a Melee.
If your thinking all Melee should have new appointed spells/triggers it depends on the uploader if they plan to make a campaign or an altered melee.