Hi everyone! Loving my A1 Mini so far but have come across a problem I’m not sure how to fix, when slicing a painted model some colours are sliced outside of the painted region. First thing it’s a big model so I don’t have a purge block which I am expecting to cause problems with colour bleeding but this seams different, like it’s purging to infill even through that setting is disabled. I’m basically wounding how does the slicer decide where what colour to print under the sliced region? I’ll attach some photos to show the problem a bit more clearly.
It looks like you painted the model in Bambu using surface brushes. When painting in this way, the slicer will try to anchor the colors in 3D which can cause such defects.
You can try to re-paint the troublesome areas using the 3D sphere brush which also gives a color in the depth of the model.
For the red and green circles, I’d use primitives as modifiers though while for the red line, you may want to consider drawing that in CAD and importing as a modifier.
Cool thank you! I had actually done this, but figured I would give it another try, unfortunately only a little luck.
It is better but I also changed from 0.08mm to 0.16 layer hight which has also helped. I’ve painted both the top and bottom of the model using the 3D sphere brush.
I was wounding if the model was to complex so I tried simplifying it and that also had little effect.
As for your second suggestion I’m afraid I don’t know what most of those words mean, apart form CAD. 
I have never come across primitives or modifiers before, this model was generated in python form topographical data. Did you think I had made it in blender or another modelling software?
Using modifiers for painting is quite clean and neat but only really works well for simple patterns without having to spend a lot of time in CAD or generating volume data in another way (such as using a Python script).
In Studio/Orca, you can right click a part or assembly and then add a modifier volume. Basic shapes are available in Studio/Orca but you can also load your own shapes. Following placement over the part, you can then change all kinds of settings only for that particular volume. Such as filament.
Painting using modifiers can be a painfully cumbersome process but you do have better skills than myself regarding Python. And of course it depends on the dataset(s). At least the red may be suitable for this method.
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Thank you! That’s going to be really cool to use in the future and save me so much time! Have a great day.
The final solution was to add a step between the water and the land which combined with the above methods yielded a good result.
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Excellent 
And congrats 
These things can be a pain but it feels good when they are solved