Fix loss of energy when passing through translucent white blocks when fancier translucency is enabled #1670
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The problem is that
Fancier translucencyisn't using the material's texture brightness to determine how much light should be reflected diffusely vs. absorbed. With this change, a translucent white block with e.g. 49% opacity will now reflect 51% of light and absorb 0%, instead of reflecting 30% and then absorbing 21% (30% of 70%).This fixes the white furnace test - before:
After:
