Are there any already-created tv noise filters or effects for use in Construct 2 that someone can direct me to?
Maybe a simple animation would pass?
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I'd recommend simply making a 3 or 4 frame animation using the noise function within any art program, and then add it as a regular sprite animation.
there are noise effects/shaders already in there.. i think there is even a sample of "tv noise" as a project file.. unless you dont want to use shaders..