An Online Artist's Coop for Artists who Paint on Location
Its Don's site and he can run it anyway he wants. So only he can answer that question as it pertains to this venue.
In my opinion not finishing a painting outside and finishing it in the studio from memory or photos makes it a studio painting. Thats why they are called plein air paintings. Plein air means painted in the open air from life. Plein air paintings can be finshed outdoors over multiple days or in one sitting alla prima.
I think we must all answer this question for ourselves. It really is as simple as that. As there are no real ways for me to control the work that is uploaded, and I only question the most blatant violations, such as dogs posing or running, we are all on the honor system here. It has been a policy of several national plein air events that 80% to 90% must be done on site. Does this mean a photo can be used for reference to complete the painting, or do you need to work from simply memory? I don't know what the rule is on that. Again, if you think it is cheating, it probably is cheating. I do not want the job of art police here, but I will and do remove work that is obviously not plein air. But you must determine what is or is not appropriate to post.
Recently, I began scraping with an exacto knife, my watercolor paper, usually on site, but often after returning home and critically evaluating my work. I rarely had ever done that before, thinking I was a purist. But Homer did it and most everyone else, that and using opaque white. I always felt like I was cheating using white paint. So we draw our own lines for where we finish a painting. One thing I do know, it is usually better to stop early than to over work a painting. Going to far is so easy to do and in the studio it is even easier.
I hope I cleared the waters a bit, but I fear not. In fact I am sure they are as muddy as ever.