Let’s add a spotlight by heading over to Create – New Spotlight. I find it easiest to switch to my Perspective View beforehand and frame my sphere as if I was looking through the light (maybe from the top left somewhere). With Iray we’ll do the same thing – but the settings are just a little different. In 3Delight we’d just add a standard spotlight, tweak the intensity and shadows until we’re happy, and then we’re done with it. The left hand side of our sphere is a little darker, and if this was a character’s face, we may want to brighten it up a bit. Not every HDRI image has a sun though, and depending on which map you use, you may not even see such a hotspot in your renders.
As you turn the camera around, the hotspot moves. Alternatively you can move the Iray Dome to move that hotspot (under Render Settings – Environment – Dome – Dome Rotation). This is the sun’s hotspot from the HDRI image map. Notice that there’s a small specular highlight on the sphere, on the left hand side (a small shots spot). The default lighting for a new DAZ Studio Iray scene comes with a small HDRI image applied by default, and when we render our scene, we can see the effects of that light source. It’s a there and a plane, both of which have Iray shaders applied (it’s Walnut on the floor, and orange car paint on the sphere). Let’s take this simple scene as as demo and a staring point. Let’s see how we can add a standard spotlight to our scene and set it up so we can use it properly with Iray. The NVIDIA Iray render engine can be a bit of a mysterious box sometimes.
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