Lighting with Vray for SketchUp _ definitive guide Part 1

Here is a screen shot of the particular interior that I will be using.

Basic SketchUp Interior

 

1. IES Lighting
I have done this in a previous tutorial here at SketchUpArtists: Basic IES Tuorial using V-Ray for SketchUp. The only difference is instead of using a rectangular light to show the light source, I will be just using a Emissive map.

Emissive Map and IES Light Icon

Here is the material I used for the Emissive map.

Settings for Material

This is the first render.

Render

2. Spotlight

Together with IES lighting, this is also a new feature with V-Ray 1.48.66  and up. Since this is a tutorial, allow me to put 4 spotlights in my four recess lamps.

4 Recess Lamps

The Image below shows the position of the Spotlight icon. I also use a Emissive maps on the light receptacles.

Position Spotlight Icon

Here is the settings for my Spotlight. For me the most critical setting is the Shadow Radius which controls the softness of the shadows, Shadow Subdivision controls the smoothness of the shadow and last but not the least is the Penumbra Angle. In the image below I used 0.3.

Spotlight Settings

Here is the render using Spotlight. In this render I used a very low resolution. This is the reason why I have splotches and grains. This can be corrected easily by using higher Subdivisions and Samplings.

Render Using Spotlight

3. Lampshades

Here is a simple lamp I modeled in SketchUp. I will show you how to place V-Ray rectangular lights.

SketchUp Lamp

Here I hid the shade of my lamp to show how I set up my rectangular lights. V-Ray rectangular 1 and 2 run along the height of the shade. They are double sided, visible but they don’t cast shadows. The one that casts shadows is the third V-Ray rectangular light. This one casts shadows, double sided but I made it invisible.

Rectangular Lights

Here are the settings of my V-Ray rectangular lights.

Vray Rectangular Lights 1 and 2 Settings

Vray Rectangular Lights 3 Settings

Lampshade material: This is a 2 sided material with about 70% gray mixture.

Lampshade Material Settings

Here is the resulting render.

Render With Rectangular Lights

Lastly, I will add a few more components. A special thanks to a friend BTH (Trang An) for some of these great components.

SketchUp Scene with Extra Components

Here is the final render.

Night Scene

I also attempted to render with the same scene, this time with GI and BG Colors on (no mapping).

Night Scene 2