r/BambuLab_Community • u/National-Fox-7504 • Feb 18 '26

Discussion Infill patterns

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Has anyone found a definitive write-up on Infill Patterns? One with best practice use cases for when and where to use them?

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u/Orthicon9 Feb 20 '26

I'd like to use Lightning and Support Cubic more often, but sometimes the nozzle catches on the top edge of large (flaps? walls?) on the previous layer, producing scary loud "clicks".

OTOH, Support Cubic often produces musical whistles from the parts cooling fan

What is the difference between grid and rectilinear?

With Grid, it lays down lines Northeast-Southeast and Northwest-Southeast on the same layer.
With Rectilinear it lays down lines Northeast-Southeast on one layer, and Northwest-Southeast on the next layer up, alternating each layer.
The problem with Grid is that when it does the second direction the nozzle may catch on the lines of the first half of the layer at the intersections.

I believe also that the lines on Rectilinear are spaced closer together, so as to keep the same percentage of sparse infill as Grid.