I know this has been reported before. For version 6.31.4, in WED, in the object properties window for a block, checking the passable flag doesn't appear to actually make the block passable. Assigning a block a turbulent texture (a water texture) makes the block passable, but simply checking the passable check box in object properties for the block appears to have no effect. Is this fixed in the current public beta 6.40.++?