The dialogue for grid fluid meshes is based on the characteristics of this particle type. Grid fluids only represent the core fluid of a large scale simulation and therefore, only a limited number of possibilities is required.
UVW Mapping
“None” disables this feature. “UV particle” takes the particles’ UV coordinates into consideration and creates an UV grid for the mesh. This mapping type can sometimes lead to distortions “Top projection” is just a flat projection method, so the map becomes stretched and distorted at the mesh’s edges. “Top projection (average velocity)” uses the same mapping method as the previous option, but it is based on the fluid’s velocity.
Load texture
This is the dialogue to open and load the desired texture used for mapping.
Texture
With this option it is possible to toggle the texture’s visibility. Once a texture has been applied you can easily switch it on or off by changing between “None” and “File”. The second option requires a previously loaded file.