If framebuffer is enabled, you'll crash when trying to enter advanced build mode.
[2017-11-30 17:16:40] GL_ERROR: GL_INVALID_OPERATION [2017-11-30 17:16:40] org.schema.schine.graphicsengine.core.GLException: GL_INVALID_OPERATION [2017-11-30 17:16:40] at org.schema.schine.graphicsengine.core.GlUtil.printGlErrorCritical(GlUtil.java:1438) [2017-11-30 17:16:40] at org.schema.schine.graphicsengine.core.AbstractScene.getAbsoluteMousePosition(AbstractScene.java:194) [2017-11-30 17:16:40] at org.schema.game.client.view.WorldDrawer.draw(WorldDrawer.java:420) [2017-11-30 17:16:40] at org.schema.game.client.view.MainGameGraphics.drawScene(MainGameGraphics.java:580) [2017-11-30 17:16:40] at org.schema.game.client.view.MainGameGraphics.framebufferPass(MainGameGraphics.java:753) [2017-11-30 17:16:40] at org.schema.game.client.view.MainGameGraphics.draw(MainGameGraphics.java:453) [2017-11-30 17:16:40] at org.schema.schine.graphicsengine.core.GLFrame.draw(GLFrame.java:504) [2017-11-30 17:16:40] at org.schema.schine.graphicsengine.core.GLFrame.render(GLFrame.java:549) [2017-11-30 17:16:40] at org.schema.schine.graphicsengine.core.GLFrame.doFrameAndUpdate(GLFrame.java:691) [2017-11-30 17:16:40] at org.schema.schine.graphicsengine.core.GraphicsContext.mainLoop(GraphicsContext.java:857) [2017-11-30 17:16:40] at org.schema.schine.graphicsengine.core.GraphicsContext.startUp(GraphicsContext.java:754) [2017-11-30 17:16:40] at org.schema.game.client.controller.GameMainMenuController.startGraphics(GameMainMenuController.java:1150) [2017-11-30 17:16:40] at org.schema.game.common.Starter.startMainMenu(Starter.java:1459) [2017-11-30 17:16:40] at org.schema.game.common.Starter.main(Starter.java:1003)