I know that. I was showing an example where two skins are touching each other (the top skin of one and the bottom skin of the other). My two "colors" are both generic PLA in Cura so no actual color change can be seen in Cura, so this view actually shows you the important part: two skins touching.
The best solution would be to have a setting that all infill is made continuous and done with one core (no skins or walls between them) and just change which core is used for which part on the real skins or walls.
GregValiant 1,454
"without extra top and bottom layers"
There aren't any "extra" top and bottom skins. What you see is the plastic required to meet your shell thickness as determined by the number of skins (tops/bottoms) and the number of walls you have. For a simple rectangular solid, that is easy to understand but once you throw in curves and angles, things get triggy (sorry for the pun).
If your model happens to have a surface that is at a small angle to the build plate, then the skin areas will be added because walls won't be enough plastic to account for the full thickness you asked for. Remember that Cura works by layers and each layer is essentially a section through the model.
The angle that is shallower will require more "skin" filling in order to maintain the shell thickness (which is measured perpendicular to the surface). The width of the added skin area is a trig function of the shell thickness and the angle to the build plate.
Here is the steeper area. The Skin area is smaller.
The closer the slope gets to vertical, the less "skin" area is required to maintain the shell thickness.
In a side note, this is also why "spiralized" models with large overhangs can't be printed. There is no skin to back up the shell and so the wall extrusions end up too far apart to support one another.
- 2 weeks later...
I understand that. What I don't want it shells between different colors of the same material. It was just the most obvious place to show it. Basically, I want a way to say "no shells or walls between colors" (or possibly how many walls/shells between colors).
It would probably be easiest to understand if you could share a Cura project file (.3mf, set it up then go to File > Save Project) of your work and point out the areas where you're not getting the intended result or annotated some screenshots with the preview mode set to material colour so we can see what specifically you're referring to.
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Slashee_the_Cow 541
Your screenshot shows the Line Type preview mode, which shows it what part type each part is (in this case, yellow = skin, red = outer wall, green = inner wall, orange = infill), not what colour it will be printed - I don't have a dual extruder printer (or access to Cura right now) but if you click the top middle button whle in Preview mode it should come up with a box, at the top is a combo box, just click on it to open the list and I think Material Colot is one of the options.
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