Hello Thanks bagginsbill for your hard work on this shader. I've been doing some experimenting with this shader and I've found that the fall-off become less predictable when negative values are used for the light's coordinates. That may explain some of the problems that jonthecelt is experiencing. jonthecelt, if you move the "Dream Home" so that it rests in the positive area in the world space then all the light will have positive values for their XYZ coordinates - that should produce a much more uniform fall-off for each light. take care jdc