Theoretically, it's no problem implementing such feature for ANY level version (obviously, except TR1, because it has no wade animations). Only thing is you have to force room flag to 0x02 value. For example, you can create ordinary TR2/TR4/TR5 level in Dxtre3d or TRLE, reserve some dummy rooms for quicksand, then use some editing software (like Rview or whatever which allows to edit room flags) and make these rooms actually work like quicksand in OpenTomb!