Hello! I have read several questions about adding textures here, but they have all been about layers and such. I cannot figure out how to simply start with textures. I have tried what the manual says and what several people here said about layers with no luck. Nothing at all happens.

Could someone be so kind as to take it step by step (as Ive seen so kindly done before) and help me out? Take it from after creating all the land. My map is looking awesome, as I can do pretty much everything but textures for some reason.

Thanks!