Vray Water Texture

Vray Water Texture settings & what they do-

"Height multiplier" is equivalent to "Wave Height" in HOT;
"Resolution" in HOT is specified with the power of 2, but is the same in both;
"Patch size" is similar to the "Size" attribute, but you should modify the Repeat U/V of the placement node to get the same effect;
"Choppy multiplier" - controls the choppiness, should be the same as HOT's "Choppiness" (the values are different, thought);
"Rate" - controls the speed of the animation;
"Seed" - seed for the random generator. VRayWater and HOT use different generators, so you can't expect to have exactly the same results;
"Wind direction" waves perpendicular to the direction (relative to the UV space) are removed;
"Wind magnitude" - "Wind speed" in HOT;
"Wind direction multiplier" - controls the effect of the wind direction. The values are from 0.0 to 1.0 (0.0 means direction is ignored);

Surface Shader in Vray

For a surface shader in Vray. Apply texture to a Vray Mtl node and hook that material into the Vray Mtl Wrapper.

Vray Textures with alpha in one

I need to remember this.

To have a single image which contains Color as well as the alpha channel. One must create the mask and invert the mask in the channels segment in photoshop. Save that out as a tiff with layers and alpha and it will hook it up automatically without any reverse nodes.

Please remember to add the gamma input to de-gamma the color texture for linear workflow.