I'm trying to figure out the best way to accumulate color via an attribute transfer node using a SOP solver. I've attached a simple scene with a null animating across a wall grid and using a SOP solver to accumulate transferred color onto the grid. It works fine, but if the sub-steps are too low there are gaps in the path and I want a straight curve/line that follows the null's path even if it jumps great distances between frames. Is increasing the sub-steps the best way to accomplish this faithful color transfer of the null's path, or is there some other more efficient method? I started off using particles emitted from the null point and sticking to the grid, but that also required some oversampling. I've read about the timeblend node, but I think that's not going to help me here.
Any tips would be most appreciated, thanks