Conversion of jpeg files to asl file format

Everything points to the fact that Photoshop layer files (.asl) can only be created using Photoshop from a proper source like JPG/PNG. Such jpeg to asl conversion (or rather just operation) can be dne through the layer menu and settings in Adobe Photoshop.

Open JPEG file    Open ASL file

Related software

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Adobe Photoshop

One of the best bitmap graphic editing program

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Adobe Photoshop for Mac

Mac version of popular digital image editor