space render in bottle glass

[blender974]

Hello,

the strange marks on the render of a bottle, have you ever had the same problem?

thank you in advance

[Chad Holton]

Hi,

Do you have multiple surfaces on top one another by any chance - like the fluid inside the bottle and the inner glass surface are sharing the same space?

[blender974]

yes of course,

but spacing is perfect, and I do not have this problem on other bottles :s

[Chad Holton]

Well, try hiding the fluid object inside to see if the strange marks disappear. If they do, try scaling the fluid object down just a hair more. Let us know how it goes.