Bobby Rico Posted April 7, 2018 Share Posted April 7, 2018 Hi all I can see an optical illusion when looking at these trilobite photographs but you will need to come back to the post a couple of time for it to work. So is it positive or negative? Link to comment Share on other sites More sharing options...
Fossildude19 Posted April 8, 2018 Share Posted April 8, 2018 Great pictures Bobby. I've noticed that when there is high contrast on some fossils, this type of illusion is fairly common. With that said, looks like it is a negative, to me. Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted April 8, 2018 Share Posted April 8, 2018 I will say positive! Do I win a prize! Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
xDiamondX Posted April 8, 2018 Share Posted April 8, 2018 Negative for sure. (No pun intended) this illusion happens to me sometimes too Link to comment Share on other sites More sharing options...
Miocene_Mason Posted April 8, 2018 Share Posted April 8, 2018 1 minute ago, xDiamondX said: Negative for sure. (No pun intended) That’s no pun, that’s an oxymoron! ive noticed this illusion when drawing a pyramid, it can be seen as if you are viewing it from the top or like the front face is transparent and you can see the back vertex. “...whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been and are being evolved.” ~ Charles Darwin Happy hunting, Mason Link to comment Share on other sites More sharing options...
xDiamondX Posted April 8, 2018 Share Posted April 8, 2018 It happened for me on this one... Link to comment Share on other sites More sharing options...
Raggedy Man Posted April 8, 2018 Share Posted April 8, 2018 Looks like the ventral aspect ...I'm back. Link to comment Share on other sites More sharing options...
caldigger Posted April 8, 2018 Share Posted April 8, 2018 The top pic. seems like a positive, then looking at the second from far away it changes to negative...I'm scared! However, negative it is. Link to comment Share on other sites More sharing options...
Wrangellian Posted April 8, 2018 Share Posted April 8, 2018 I agree, looks like the light is coming from the top on the overall piece, so the bug must be a neg. Nice neg, tho! Link to comment Share on other sites More sharing options...
MeargleSchmeargl Posted April 8, 2018 Share Posted April 8, 2018 99% sure it's a negative. Hunt there regularly and have put many of the trilos in the light to take pics. It's a nice one, too! Every single fossil you see is a miracle set in stone, and should be treated as such. Link to comment Share on other sites More sharing options...
Max-fossils Posted April 8, 2018 Share Posted April 8, 2018 Very cool! I’d say it’s a negative simply because the contrast with the matrix is small, but just by looking at the trilo I wouldn’t have been able to say... It really does switch between the two! Max Derème "I feel an echo of the lightning each time I find a fossil. [...] That is why I am a hunter: to feel that bolt of lightning every day." - Mary Anning >< Remarkable Creatures, Tracy Chevalier Instagram: @world_of_fossils Link to comment Share on other sites More sharing options...
xDiamondX Posted April 8, 2018 Share Posted April 8, 2018 Oh wow my brain just switched it... I can't unsee it now. Positive it is positive. Link to comment Share on other sites More sharing options...
Bobby Rico Posted April 8, 2018 Author Share Posted April 8, 2018 Thank you very much @Fossildude19 @Tidgy's Dad @caldigger @Raggedy Man @Wrangellian @MeargleSchmeargl @Max-fossils and @xDiamondX. I can most the time only see it as positive but that is strange as I know it is negative. One thing for sure is you have to love them sweet Georgia light brown trilobites. Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted April 8, 2018 Share Posted April 8, 2018 12 minutes ago, Bobby Rico said: Thank you very much @Fossildude19 @Tidgy's Dad @caldigger @Raggedy Man @Wrangellian @MeargleSchmeargl @Max-fossils and @xDiamondX. I can most the time only see it as positive but that is strange as I know it is negative. One thing for shure is you have to love them sweet Georgia Lt brown trilobites. Oh. So did I not win then? Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
Bobby Rico Posted April 8, 2018 Author Share Posted April 8, 2018 3 minutes ago, Tidgy's Dad said: Oh. So did I not win then? Sorry my friend not this time but I was with you in the positive camp. Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted April 8, 2018 Share Posted April 8, 2018 1 minute ago, Bobby Rico said: Sorry my friend not this time but I was with you in the positive camp. Right! I'm off to sulk. Speak later. Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
FossilDAWG Posted April 8, 2018 Share Posted April 8, 2018 This is why paleontology journals require all photos to have lighting from the top left. If you know the direction of the light you can always tell if a specimen is positive or negative. You can also tell if a feature is a bump or spine sticking up as opposed to a pore or depression. Don Link to comment Share on other sites More sharing options...
Bobby Rico Posted April 8, 2018 Author Share Posted April 8, 2018 1 hour ago, FossilDAWG said: This is why peleontology journals require all photos to have lighting from the top left. If you know the direction of the light you can always tell if a specimen is positive or negative. You can also tell if a feature is a bump or spine sticking up as opposed to a pore or depression. Don Thank you very much very informative and helpful but it was also fun playing with the optical illusion. Link to comment Share on other sites More sharing options...
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