variable layer height - for speed AND quality

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print outer layers @ high resolution, and inner layers at lower resolution

ex: http://i.imgur.com/FcCKs91.png

[dorsai3d]

You can already print the infill as thicker layers with the "Print infill every X layers setting", but the perimeters are all the same layer height. I'm not sure that you'd get very good quality from thicker inner perimeters, though. There's too many things (like most overhangs) that require good inner perimeters to print a quality outer perimeter.

[arhi]

if you "print sparse infill every 2 layers" it will print the infill only every second layer and it works like a charm, I'm very happy with it .. I'd like to have bit more options there like:
- extrusion multiplier for solid layers
- extrusion multiplier for infill
- perimeter overlap for solid layer, separately for top, bottom, middle solid layers
- perimeter overlap for infill
- perimeter overlap for bridge (this actually exist but it is hidden)


perimeter:
every layer: E0.0143 F2625
same line for every third layer: E0.0143 F2228

so E value is exactly the same (as expected)
and F value is 17% lower

dunno why is printing perimeter slower in this case ?!

infill
every layer:
; infill
G1 X53.409 Y59.899 Z2.855 F4500
G1 X53.308 Y59.974 Z2.855 F4500
G1 X53.100 Y60.169 Z2.855 F4500
G1 X52.911 Y60.378 Z2.855 F4500
...

every 3rd layer (same height):
; infill
G1 X53.409 Y59.899 Z2.855 F4500
G1 X53.308 Y59.974 Z2.855 F4500
G1 X53.100 Y60.169 Z2.855 F4500
G1 X52.911 Y60.378 Z2.855 F4500

?? completely the same? this is probably infill on a solid layer

later on it's bit different:
1:1 layer:
G92 E0
G1 X55.659 Y66.476 Z2.855 E0.1909 F3500
G1 X55.964 Y66.454 Z2.855 E0.2001 F3500
G1 X56.323 Y66.387 Z2.855 E0.2112 F3500
G1 X56.664 Y66.292 Z2.855 E0.2219 F3500

1:3 layer:
G92 E0
G1 X55.655 Y66.480 Z2.855 E0.5721 F3500
G1 X55.794 Y66.474 Z2.855 E0.5847 F3500
G1 X55.875 Y66.461 Z2.855 E0.5922 F3500
G1 X55.955 Y66.455 Z2.855 E0.5995 F3500

so coordinates are not "identical" but "almost" (same Z and X/Y are close), F is same as expected but E is different, E is 3x bigger, so it's actually pushing 3x more plastic as to be expected ..