The 20% infill assumption ignored walls and solid layers which dominate
most prints. Validated against Bambu Lab Studio for a GF lid:
model volume 26.09 cm³ × 0.50 × 1.24 g/cm³ = 16.2 g (actual: 16.24 g)
16.2 g / 32 g/h × 60 = 30 min (actual: 30.5 min)
New env vars (read at request time, no rebuild needed):
MATERIAL_FACTOR=0.50 fraction of model volume that becomes filament
PRINT_SPEED_G_PER_HOUR=32 matches Bambu Lab at normal quality
Card header now shows active assumptions including speed.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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