For instance, here are sections of gcode from 2 different raft separation settings. The first is with .14mm and the 2nd is with 1mm.

In the first example, layer 7 (the first layer after the raft) is at Z = 2.2473 and layer 8 is at Z = 2.3073. Layer 8 is above layer 7.

In the second example, layer 7 is at Z = 3.1073 and layer 8 is at Z = 2.3073. Layer 8 is below layer 7.

Notice layer 8 Z setting did not change regardless of the separation.

**Layer separation only affected one layer instead of shifting the whole model.**

So layer 7 is the only layer that got the separation applied, and then the nozzle dives back down to the same height for layer 8 regardless of the setting you applied that is supposed to elevate

**the entire model**above the raft. You can effectively never get more separation except for the first layer of the model (layer 7 in this case) and at best, layer 7 didn't stick to the raft quite as badly however the nozzle will basically push layer 7 down to the raft when it does layer 8. This is just really ugly.

Whether or not there is nothing but air under the nozzle allowing layer 7 to fall to the raft is beside the point. It's simply doing the wrong thing in the gcode. The preview is working like a CNC backplot function to show what the generated code will do. With the powerful multi-process and multi model capability in S3D you can construct complex print jobs or do other things to create something other than air between layer 7 and the raft.

GCode below has only layers 7 and 8 for simplification:

-----------------------------------

First with .14mm separation.

; layer 7,

**Z = 2.2473**

; tool H0.314 W0.400

; inner perimeter

; outer perimeter

G1 X17.182 Y17.199 F6000

G1 Z2.247 F600

G1 E1.0000 F1200

G1 X0.818 Y17.199 E0.8549 F3600

G1 X0.818 Y0.835 E0.8549

G1 X17.182 Y0.835 E0.8549

G1 X17.182 Y17.199 E0.8549

; layer 8,

**Z = 2.3073**

; tool H0.200 W0.400

; inner perimeter

; outer perimeter

G1 X0.818 Y-0.835 F6000

G1 Z2.307 F600

G1 E1.0000 F1200

G1 X0.818 Y-17.199 E0.5443 F1800

G1 X17.182 Y-17.199 E0.5443

G1 X17.182 Y-0.835 E0.5443

G1 X0.818 Y-0.835 E0.5443

Next with 1mm separation.

; layer 7,

**Z = 3.1073**

; tool H0.314 W0.400

; inner perimeter

; outer perimeter

G1 X17.182 Y17.199 F6000

G1 Z3.107 F600

G1 E1.0000 F1200

G1 X0.818 Y17.199 E0.8549 F3600

G1 X0.818 Y0.835 E0.8549

G1 X17.182 Y0.835 E0.8549

G1 X17.182 Y17.199 E0.8549

; layer 8,

**Z = 2.3073**

; tool H0.200 W0.400

; inner perimeter

; outer perimeter

G1 X0.818 Y-0.835 F6000

G1 Z2.307 F600

G1 E1.0000 F1200

G1 X0.818 Y-17.199 E0.5443 F1800

G1 X17.182 Y-17.199 E0.5443

G1 X17.182 Y-0.835 E0.5443

G1 X0.818 Y-0.835 E0.5443