Although you can fill your text so that it appears textured within PowerPoint, the final result depends upon the texture you use for the fill, and how well it contrasts with the slide background. For reasons of readability, make sure that the texture used is not too crowded or even multicolored — and as already stated, choose a texture that contrasts with your slide background.
Learn how to add texture fills to the selected text in PowerPoint 2013 for Windows.

