Photoshop / Smooth a t-shirt

[bettlebug]

Hello any and everyone. I want to do a Tshirt mock. 

Does someone have a tutorial on how to smooth out wrinkles on a tshirt that still have a screen print image on the front?

and possibly change the lighting to enhance the photo. Thank you. 

[JakoPhoto]

https://creativecloud.adobe.com/cc/discover/article/mock-up-a-t-shirt-design-with-adobe-photoshop?lo...

[Conrad_C]

For the shirt alone, frequency separation is a popular technique for removing wrinkles.

Changing the lighting can be done by adding gradient layers using blending modes. A radial gradient can be a quick spotlight, if set to a light color with an appropriate Opacity level and/or blending mode.