● The product is very easy to use, all you have to do is add this material to your asset browser and drag and drop the material to the 3D object that you want to reveal with this effect and apply 'All transform'.  Once the effect is applied you can just simply adjust your animation and pixel size in the shader editor.
● Copy and paste your default shader with textures and connect it to the mix shader of the pixel reveal material to get your pixel wipe effect without losing your textures.

(Note: The effect works best if the 3D object is placed above the XY plane, and the object scale is not "too big".)

(Quick fix: If the scale of your 3D object is too big and the effect is not working properly then bring the size of the object down to the default cube and apply 'All transform' again and scale it back to the original size.)