I'm trying to use a lightmapped_4wayblend shader, but am having difficulties. I've created a simple test material with tinted albedos to see if it's working, but nothing seems to happen when I blend. Every channel shows up, but the preview image for each channel looks the same as my base material. The debug mode shows that each vertex channel can be painted, but it looks the same as my base material.
I included an image where you can see the debug mode showing that the vertex channel painting is functional, but the material doesn't look any different.