Maya2018_light

Arnold ; arnold shade in hypershade ; increased intensity + exposure dramatically

also in arnold render mode, object's surface should be assigned with arnold shade surfaced via hypershade and should increase intensity dramatically in spotlight

OMG lightening so complicated

Also important to know aiAtmosphereVolume value! 

below is setting of these lights

arealight1 > intensity: 50000 / Decayrate : Quadratic / Shadow Rays : 16 / Exposure : 0.1

arealight2 > intensity: 50000 / Decayrate : Quadratic / Shadow Rays : 16 / Exposure : 0.3

spotlight > intensity: 5000 / Decayrate : Quadratic / Penumbra Algle : 10.2 / Shadow Rays : 16 / Exposure : 0.2

aiAtmosphereVolume > Density : 0.001

Maya turn-off Light reflection/specular

select light > attribute editor > ###light Attributes > uncheck Emit specular

or

select object > go to shader menu > Specular > make weight to 0