I have a photo question. Thinking of having a website with customers able to "upload" or email a pic. I will be sublimating onto hard substrates. Are pics that are uploaded better than being emailed as far as the resolution or does every pic lose quality when being transferred from one medium to another? I'll have to have good resolution for hard substrates compared to tshirts. I was just wondering how much work will have to be done in Photoshop to correct resolution. I'm sure most pics will come from phones. Just learning about dpi, ppi, etc...gets very confusing and I don't want to waste ink on practicing too much. Thank you for any feedback.