Not really Isometric, actually Military Projection. Inspired by PsychicToaster's work for their game, which will be great (watch for it.)
IsoEasyStarGBAV3.c3p
construct.net/en/forum/extending-construct-2/addons-29/behavior-easystar-js-96215 by Magistross and ported to C3 by Eren
Updated project file.
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looks great.
I also asked Eren on their github to fix the posted C3 version.
i fixed c3runtime. thanks for reporting this problem.