Hi there, I've been trying for a little while to get triplanar displacement working with material x and karma. I've managed to get it working and can scale the tiling but I'm completely stumped as to how I'd control the fall off of each axis? Any help would be much appreciated!

CAn u tell me what to put in the geopropvalue ?

unfortunately this is not possible with this node. The mtlx definition is also not great as it seems to have an additive overlap, causing the corners to inflate. If you want to get the desired effect with an adjustable falloff, you will have to build/write the node yourself. this is doable with the materialX nodes so it shouldn't be too big of an issue!