hi, i am new into 3d and want to use this tool to make some 3d prints. first modelling in openscad and then slicing and printing on prusa i3 mk3. my question about modelling, i havt this simple code: $fn = 10; difference() { cube (size = [40,30,4]); # translate ([20,10,0]) { cylinder(d = 7, h = 4); } } now when i render the model the hole does not look round. wehn i alter the parameter $fn to 100 it looks round. is this parameter $fn just a visual thing or does my 3d print (after slicing) come out as it looks on the screen with edges? and next question: i want to have this plate with a hole. translate starts from 0 and the hole/cylinder is exact 4 high, as the plate. is that ok? or do i have to set translet -1 and cylinder high 6, as shown on the manual and sample? thank you, claudio

thank you for the first answer..... i just dont understand exactely your second idea below... mybe with a small sample script? > You should avoid coincident surfaces by subtracting a longer cylinder > when drilling holes. To avoid the extra translate I often use a > cylinder twice as long plus 1 and center = true when drilling. my sample: >> $fn = 10; >> difference() { >> cube (size = [40,30,4]); >> # translate ([20,10,0]) { >> cylinder(d = 7, h = 4);

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