Working on the next build of #BuildingGadgets -- Currently it costs 10 ForgeEnergy to build. In the below screenshot, i have enough energy to build 12 blocks, which is why 12 out of the 25 blocks are not red in the background image :). None of the numbers here are final.

Are you rendering "no blocks left" differently from "insufficient energy" ?

Nope. Rendering it the same. :)

May I hereby request a subtle difference?

Yea I kinda think its too noisy. I'll probably stick with all red. Up to the user to figure out what they don't have enough of (Which shouldn't be TOO hard!) :)

You could overlay with the visible-barrier-block for no-power, and the current red overlay for no blocks?

Yea I don't want it to be too noisy, its a neat idea, but I think its easy enough for the user to figure out what they don't have enough of (Blocks/energy) that its probably not necessary.