Blight

When I put blight in certain places it doesn't always fully come out. Why? :(

Like on water? Or up mountains? Where exactly are you putting blight?

I may be wrong on this, but blight can only be placed on areas where the Undead are able to build. Similarly, blight and buildings of other races are incompatible -- non Undead buildings have Dispel Blight abilities that prevent blight from doing the same thing that creep did in Starcraft.

If none of these vague answers help, perhaps you could be more specific?

I do have non-undead buildsings around it so i'm going to try that out first before I come back.

blight will be skippy around cliffs like ull have this small area at edges were blight wont go

Blight only effects Buildable terrain types.