Lukas Stockner bcefb202a2 Cycles: Save a few instructions in area light sampling
Just basic algebra - because all vectors have the same z coordinate, a lot of terms end up cancelling out.

Not exactly a massive improvement, but it's measurable with Branched PT and a high sample count on the lamp.

Reviewers: brecht, sergey

Reviewed By: brecht

Subscribers: swerner

Differential Revision: https://developer.blender.org/D3540
2018-07-27 23:42:50 +02:00
2018-07-22 16:02:28 -06:00
2018-07-05 07:53:21 +02:00
2018-06-29 09:23:51 +02:00
2018-07-03 06:55:02 +02:00
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