Simple Mapping by Object
Video below is maked with standart planar mapping:
Advanced Data Manipulation | #Box3
Blending 2 predefined colors by checking if particles is inside proxy object(Sphere002). If condition is positive, then that particle get one color value to the vertex color channel. If not, another color input value go through the flow without any interpolation.
Also, keep in mind that suboperator New In Event is designed to take initial value on the event entry only. It should be connected with flow output or proxy geometry input.
Above method isn’t recommended while colors are generated inside the flow. It’s always better to have colors in map and in particles to set required mapping:
Same can be done with particles from another system:
P.S. this is what can be done with aplied Frost to the particles, just apply vertex color as diffuse map to the frost material.