New Physics

• Fluid viscosity: lava and other thick fluids flow slower through pipes. Lava has ~2.5x more friction than water. Configurable via viscosityScaling (set to 0 to disable)
• Siphon effect: pumps can push fluid over hills. The pump only needs enough power to reach the peak — the descent is free
• Flow splitting: when pipes branch, flow divides proportionally. A junction feeding two tanks splits the flow 50/50 instead of duplicating it

Goggle Improvements

• Fluid density and viscosity shown in the tooltip (e.g. 3000 kg/m³ · 6000 cP)
• Viscosity penalty displayed when flowing thick fluids (e.g. 2.5x friction)
• All pipes in a straight line now show the same flow rate — no more flickering between different values
• Remaining range decreases as you look further from the source
• Cleaner numbers throughout

Bug Fixes

• Fixed cauldron drain/fill not working with open-ended pipes
• Fixed flow rate jumping around every few ticks when tanks are draining
• Fixed crash during chunk generation with Sable tank mass
• Fixed pump range arrows not showing past siphon peaks