If you want a quick and easy way to add texture to your paintings then you can use tissue (the type you blow your nose on!) or tissue paper. ideally you would use PVA to apply the tissue to the canvas but if you don’t have any then you can just use acrylic paint. Either put the tissue on top of the wet paint or add the tissue to the paint and apply it to the canvas – you could also add a little water if it is a bit thick with the tissue in.
Just leave it to dry (ideally overnight) and you have a good base to paint over. You can build up big layers of the tissue if you want to have a really heavy texture under your painting.