Scrawl whatever you want in white on the black boxes in SignEmptyTexture.png in MS Paint or something to make your signs, then expand the Signpost prefab instance after dragging it in (don't edit the prefab) and drag your texture onto 'cube' to update the texture of that particular signpost
Scrawl whatever you want in white on the black boxes in SignEmptyTexture.png in MS Paint or something to make your signs, then expand the Signpost prefab instance after dragging it in (don't edit the prefab) and drag your texture onto 'cube' to update the texture of that particular signpost