Would have been easier with some sample code, however, twenty minutes later I found the water! Fixed for U6 beta4.
To preserve legacy behaviour, added a new load object mode to retain the use of material AND texture data from an object:
LOAD OBJECT All Parameter Options:
// 0-DBV1 legacy behaviour
// 1-DBPro : out of the box new pro standard
// 2-Leave states alone to keep material/diffuse effects
// 3-Leave states alone to keep material/texture effects
And the new one:
// 4-Ensure object blends texture and diffuse at stage zero
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