Dear All,  I don't know if I published this post in a right place, Recently I want some cobblestones, So I try to modify HBS's White Sand with GoFSH and reader and Photoshop, Then I found that when those lots overlap each other, There are some glitches appeared around the overlap area. I think maybe you can see them with the second screen-shot below. Just a sudden and random thought. I guess it's a z-fighting problem, since I remembered some posts had mentioned that before, so I want to change my game from hardware render to software render for a test. Then I don't know why,  I just couldn't swith to software mode. Then I try to modify the PEG-PPond Tahoe's water, I just only changed the water's color, Then still the same thing happened in PPond water, so I have a question, If it's a z-fighting issue, why there is nothing wrong with the original lots. Or there were some thing wrong I just couldn't recognized them with eyes. Or maybe it means I should tweak some settings of the S3D's Mats tab, such as 'Flags, Alpha, Depth, Src Blend, Desc etc'. If It isn't a z-fighting problem, Then I will try to learn from Peg or HBS's lot to create a whole new one. As always, Thanks for any help or tips you can provide! Thank you! Sincerely, -- Raymond