IRender Tutorial - Lights

IRender Tutorial - Lights

This Lights Tutorial explains how to add lights to your SketchUp model for use with IRender , and how to place lamps in your model or components to create your own lights.

There are several ways to add lights to a SketchUp model:

Ways to make lights with IRender nXt

- Lights and Lamps from Lamp Wizard -

Place a Ceiling Light using the Lamp Wizard See: Ceiling Light Tab
Place a Spot Light or Light Bulb using the Lamp Wizard See: Lamp Wizard
Place a Floor Lamp or Table Lamp using he Lamp Wizard See: Creating IRender Lamps and light bulbs

- Make Lights from Geometry-

Treat an object as a light source using Object Properties See: Treating an object as a light source
Treat an surface in your model as a light source usng the Material Wizard See: Treating an object as a light source

- Other Lamp sources -

Download an IRender Ready light from the 3D Warehouse See: IRender Ready lights


Place and Render Ceiling light

For the first part of this tutorial, we will place a ceiling light in the ceiling.

Step 1: Load a model with a ceiling, or get this model from the 3D Warehouse

  1. You can load this model from the 3D Warehouse: Simple Room for Rendering Tutorials
3D Warehouse model

Step 2: - Load the Lamp Wizard and place ceiling light in ceiling.

  1. If IRender nXt is nt yet installed, see: How to Download and Install
  2. Load IRender nXt from the SketchUp Plugins menu
  3. Click the Create Lamp icon on the toolbar
  4. Select the first tab - Ceiling Lights
  5. Click Place to place a lamp component in the ceiling.
Create Lamp Wizard

Step 3: - Set Lighting Defaults for an interior scene with lights.

  1. Load the setup wizard using the Setup Icon on the toolbar
  2. Load the Presets tab
  3. Select the Interior no Sun Preset.
Lighting Preset Setup Tab

Step 4: - Render model with new lamp

  1. Click the Start Rendering icon.
  2. If this is you first rendering, a dialog will come up to review rendering settings - Click OK
Rendered image with lights

See Create Lamp or Light Fixture for more information

Creating your own light fixture components

You can create a Light Component by placing a lamp in any component.

You may need to remove some objects that would block the light or make the items which would block light transparent.

IRender automatically prevents light from a lamp from being blocked, or casting shadows, from any entities which are placed in a group with the lamp. Only one lamp can be in each group, so if you have a component which holds two lamps, you will have to break it into separate parts and group them together.


There is also a Create Light Fixture Wizard which will create custom table lamps and floor lamps.

Treating an object as a light source

If you have a component which contains a surface, or bulb which you want to make glow, you can use one of two methods to treat it as a light source.

  1. Create a Light Source Material, or
  2. Use Object Properties to mark it as a light source.

Create Light Source Material

Glow tab on IRender nXt Material Wizard

In IRender nXt , you can use the Material Wizard to create a material which is a light source. Either right click on a face or object containing that material to load the Material Wizard, or use the Place Material Wizard to select a material from the model and define a glow for the material.

When a light source material is placed on a surface, the surface acts as an omni-directional light source. If you want to create a diffuse light (with direction) or a spot light, you will need to use Object Properties to define the light.

Note:Sometimes omni-directional lights create hot spots, especially when the light is close to another surface - such as a ceiling light. A diffuse light type is better for lights on walls or ceilings. These hot spots will resolve if you let the scene render for enough passes.

Object Properties Light Source

You can right click on a component instance, group or face and set its Object Properties to treat it as a light source.

Adding lighting to an existing component

Here is a step-by-step example of creating a light with object properties.

  • 1. Select a component to use as a light. Here we have selected a light component form the 3D Warehouse - Pila Wall Sconce.

  • 2. Assign light properties to the component.
We are assigning the properties to the entire component, since the black parts will illuminate as black (no light), and should work properly. If you want only part of the component to cast light, then assign the lighting to only part of the component - bu editing the component and selecting a sub-component, group, or surface to be the light.

Long Fluorescent Light

IRender Ready lights

Some IRender Ready models in the 3D Warehouse.

IRender Ready is a collection on the Google 3D Warehouse of object, such as light fixtures, which have lights placed in them so they can be used directly with IRender

TO view and download IRender Ready models, visit: IRender Ready Collection

There is also a Google Group for discussion of the IRender Ready models. IRender Ready Group. Visit it if you would like to make comments or suggestions for models for us to make IRender Ready.

See also

External links