Did you use a lightmass importance volume? The other question is how high a resolution you were using, and how many bounces. If you have a lot of overlapping lights, and a lot of bounces, it will rapidly stack up.
Did you use a lightmass importance volume? The other question is how high a resolution you were using, and how many bounces. If you have a lot of overlapping lights, and a lot of bounces, it will rapidly stack up.