What would everyone think if, -Pixels are used as fuel. -Coal and other fuel sources can be converted into pixels at a high rate. This would be optional. -Two tiers of currency. Pixels/voxels, and Bronze/Silver/Gold/Platinum. -One Platinum coin will be equal to one pixel. Platinum can be exchanged for pixels and vice versa -Remove Pixel requirement from crafting items outside of the 3d-printer. -Remove pixel drops from any low tech worlds. -Only high level humanoid npcs drop pixels. -Creature-type npcs should only drop meats, leather, horns, claws, and pelts which can be traded. -Some merchants will only accept one type of currency if they would obviously have no use for pixels.
I think the pixel system is best left with constructing and barter. What would we gain from fusing it with the fuel system?
The reasoning is that if you are mining, exploring, or raiding. You are gaining fuel and resources at the same time.