Wow these are some shitty looking casting collages. I made 90+% of all the good quality ones I see around the net. Haven't posted new ones for a long time though, simply because no one else posts worthwhile contributions.
You'll know it's from me if the top and bottom margins are small and match, if the resolution is 3000px high, if unsightly scars and blemishes have been shopped out and if the format is identical to the one I'm posting now.
There are some shitty pics that are taken as part of a mainstream porn shoot, like with Backroom Facials. The quality ones, like I just posted, are from Czech Casting.