From Noob to Pro: Amnesia Custom Story Creation Series

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The particle editor will be covered in a later video, along with the model editor.

well what i mainly need to know was how to get an image to show up in it, but i also have no clue how to use it either so that would be very helpful too

To get an image to show up, pick a material under the Material tab. The hard part, though, is getting it to do what you want after that. I normally just type in random stuff everywhere till i get what i want; that tends to work out fine.