Any heightmap generators or modifiers?

I’m working on a game with a lot of realistic mountainous terrain, the only issue i’m having is when using heightmaps its quite difficult to find a good heightmap using tangram heightmapper.

I’m wondering if there is a tool to create and modify heightmaps with it still looking realistic and good.

Thanks

You can use EarthSculptor but it’s kinda old software, another alternative is World Machine, both of these are free for non-commercial use. The best option is QuadSpinner Gaea is free and can be used for commercial purposes.

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