Double clicking a png in jmpThe jMonkeyPlatform, a full-fledged IDE with plugins for editing jME3 content and assets. Integral part of the jME3 SDK. “Projects” view, displays it correctly.
Browsing textures in the material editor shows them up-side down. They’re also up-side down in the sceneviewerThe main 3d window of the jMonkeyPlatform, displays the output of different plugins like for example the SceneComposerA plugin in the jMonkeyEngine3 SDK, allows editing the content of j3o files which represent a complete scene or model.. and in game.
I know i’ve encountered textures being displayed up-side down before, but then they were ok as long as they were applied through the material editor.