As a prerequisite to using Face-aware Liquify functionality, ensure that the graphics processor is enabled in your Photoshop preferences. Choose Edit Preferences Performance.
In the Graphics Processor Settings area, select Use Graphics Processor. Click Advanced Settings.

Ensure that Use Graphics Processor To Accelerate Computation is selected. Click OK.These settings are enabled by default when you launch Photoshop for the first time.
If you have questions regarding GPU usage in Photoshop, consult.To show a mesh, select Show Mesh in the View Options area of the dialog box, and choose a mesh size and mesh color.To only show a mesh, select Show Mesh and then deselect Show Image.To save a distortion mesh, after distorting the preview image, click Save Mesh. Specify a name and location for the mesh file, and click Save.To apply a saved distortion mesh, click Load Mesh, select the mesh file you want to apply, and click Open. If the image and distortion mesh aren’t the same size, the mesh is scaled to fit the image.To apply the last saved distortion mesh, click Load Last Mesh.(Creative Cloud) Meshes are automatically saved in your document. Meshes applied to Smart Objects are compressed and re-editable.