Apply transparent textures to t-shirt designs with Photoshop Brushes and layer masks.
Apply transparent t-shirt texture using Photoshop Brushes. The textures shown are from the Plastisol Collection: https://thevectorlab.com/products/plastisol-vintage-t-shirt-textures
The next tutorial shows how to apply black & white textures, such as bitmap TIFFs, with layer masks:
Apply transparent texture in Photoshop using Layer Masks. T-shirt design tools shown: T-Shirt Design Master Collection 1 https://thevectorlab.com/collections/t-shirt-design-master-collection
The Big 6 Bundle (largest bundle of t-shirt design tools) https://thevectorlab.com/collections/big-t-shirt-design-bundles
Aventura graphic & logo templates https://thevectorlab.com/collections/aventura
The textures shown are from the Plastisol Collection.
You can also get these textures in T-Shirt Design Master Collection and The Big 6 Bundle.