Photoshop or any other image editor may be used to make the dummy airline tickets with a little more work. They lack a PNR code and cannot be verified on the airline website. There is a considerable risk involved in using a dummy flight ticket as identification or even while applying for a visa because they are easy to spot.
To go through immigration check and apply for a visa, you will need to buy a dummy ticket with a confirmed PNR.
You should be able to purchase a dummy ticket for INR350/$5 in about ten minutes.Visit https://www.airdummyticket.com/ to make a quick transaction.