How do I fix infill support in Cura? I am making this dog feeder. My goal is to 3D print it using an Ender 3 V2. I am using Cura to slice it. When I slice it, though, Cura does not see the Top part (Dispenser box) as a solid piece. And when I am slicing it, it does not create an infill for the ramp. I have tried using the infill support option and setting the infill overhang angle to 0, but it still does not create infill support on the ramp. Here are some prints: ![Notice that there is no infill under the ramp#1]( "Notice that there is no infill under the ramp#1") ![Notice that there is no infill under the ramp#2]( "Notice that there is no infill under the ramp#2") Notice that there is no infill under the ramp. How do I make Cura understand that this is a solid piece?

I've followed the link in the question and exported the dispenser box and sliced it in Ultimaker Cura 4.12.1 and it will slice just fine.

![enter image description here](

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_From a comment on the answer from the OP I've learned later that the model has been fixed. So the issue was related to the model/STL file, not an issue with Cura._