Reference photo use, HELP!

[LinzCarpArt]

I hope this is the right place to post this, I didn't know if it should be in General Business or here in Legal Corner. I have a question regarding copyright and the use of photos from the WetCanvas RIL. I have asked questions here before as to their use and understand that they may be used as reference material in the creation of new artwork (meaning it cannot be used as a photo or be reproduced as such). I have used some pictures from the WetCanvas RIL that I absolutely love. I am doing a series of them and have a few people who are interested in purchasing a couple of my completed pieces. I have contacted each owner of the original photographs to thank them for the inspiration and reference. I also asked permission to sell which all so far have given me full permission and I was also instructed by one member that I do not need to ask permission to use so no need to contact anyone. Now here is my question. When I display or list my artwork to sell, do I need to now give credit to the owner of the photo reference I used? If so how do I go about doing this? I don't know the real names of these individuals and if I use their WetCanvas handles that may be confusing or unprofessional? I am just confused on how to do this and what I can legally do and not do. Would it be be ok to leave out the citation, is it necessary? Must it be included? If I do need to do this how do I go about wording it? Also, I still have not received responses from a couple of the people regarding their reference photos, is it ok for me to proceed with displaying and selling them if I don't hear back?

Thank you all again in advance, you are all so helpful!!

[Cariboo Bill]

I hope that someone has helped you out by now but maybe the grounds are too murky. The Reference photos are uploaded with the understanding that you can use them to paint from and you can sell the painting. Infringement comes if you reproduce the photo itself and want to move that along. I don't think you need to indicate any of your sources. However if you had a very successful picture that you wanted to start making prints of AND if it was very close to the original photo I would get back in touch with the photographer and work something out.
Bill

[Yorky]

This thread has jumped to the Legal Corner

I'll try and relocate it.

Doug

[Charlie's Mum]

This has shown up here as a new thread, so not sure where it's been all the time!

You are correct in your knowledge of use of the image.

Some places ask that you do indicate the source of your ref. if it is not your own - if you don't know the name of the person at such a time, then it should be OK to say the member's WC name and the RIL.
e.g one of the sites I show work on asks for such information - all I say is "Painted froma reference supplied by ....... to the Reference Image Library of WetCanvas". - if you don't know the real name, there's not much else to be done ........ and if others wished to check the original, they could always look it up here

[LinzCarpArt]

Thank you so much for you responses! This is an older post and I have already obtain the information I needed regarding this question. I really appreciate the information!