Building Generation : research best strategy for water level grime

[technicalliy]

Shader or something else?

[technicalliy]

ideas:

• https://gamedevelopment.tutsplus.com/tutorials/how-to-use-a-shader-to-dynamically-swap-a-sprites-colors--cms-25129
• http://acegikmo.com/shaderforge/wiki/index.php?title=Time_%26_Pulsating_Lights
• https://answers.unrealengine.com/questions/43771/transformation-from-one-material-to-another.html
• (from above) https://docs.unrealengine.com/latest/INT/Engine/Rendering/Materials/MaterialInstances/index.html#materialinstancedynamic