Modifiers doesnt work with cut models

My modifiers in BS doesn’t work, if I cut my object. If I let the object original, the modifier works.

I guess its a bug.




Could you kindly rearticulate what your objective is? It’s unclear from your statement what you were trying to achieve and where you feel it failed. The images show connectors working, so where is the bug?

I wanted to the modifier to change the infill % in the lower part of my model. If I change that while the object isn’t cut, it works. If I cut it with connectors, the modifier won’t modify anymore. Even if I create new ones.

If interpret your objective. You’re trying to apply a thickening of a section to the model after the cut. What I might suggest in order to verify that you’re employing the correct technique - and save you lots of time and filament - why not try out what you are attempting on a simpler model to verify that you are cutting and modifying correctly.

I took a simple cube primitive just now and elongated then cut it with pegs. This is to demonstrate that I cam able to use a second cube primitive on one half of the model and as you can see by the slice, I was able to influence the layer thickness. Unless I misunderstand you, is that what you’re trying to achieve.

To describe my situation:

I want to print a model, which is too big for my 18^3cm build plate. That’s why I cut it into two pieces and put those on separate plates. Once I set all global settings, I created a modifier cube as you did and changed its infill percentage higher than the rest of the model, because I want one part of my object to have more infill.

That’s where it gets weird. The modifier settings doesn’t apply and only the global settings or the object settings of my object does. The modifier doesn’t work.

I tried the modifier with that exact object and a benchy. It worked in both cases, until I cut those. The already applied modifier works and I can cut as much as I want, it still works. But if I change settings on exact that modifier, it won’t apply on the cut object anymore.

What I did was: I did all the settings for my modifier which I wanted and after that cut my object together with the modifier. In that case my modifier works, if don’t change any settings anymore.

OK. I think I understand now. Just to restate what I understand so I am certain clear. You added modifiers first then cut? Is that correct? Have you tried to cut then modify? I ask because in my experience the software simply won’t allow a modifier to transfer to a cut object. The modifiers appear to be applied during slicing and if you are in fact applying the modifier, cutting and then slicing, I don’t believe the algorithm supports this.

I was able to perform that sequence of events using the height range modifier and then perform the cut.

Here is the layer at 1.32 mm using 50% infill for the first 2mm.

And then to show the transition, here it is again at layer height 3.08mm. As you can see, there is a side by side difference between infill densities and I also changed the pattern from Crosshatch to tri-hexagon for emphasis.

Here’s what the cut model looked like.

Simple solution to the problem:

I had to use “Height Range Modifier” to let it work. The normal modifier, wont modify after cutting the object.

But to be honest, I am not sure if that’s intended behavior or not. Why is the modifier not working after cut?

Thanks for your help Olias!

I’m just speculating but it’s likely that the developers added the code for modifiers as an add-on feature. It would be easier to add this as a bolt-on function after the all other functions than to rewrite the original slicing function to incorporate this. But that’s only a theory.

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