Adding Noise to Light

Adding Noise to Light

Maya 2012 Tutorial


How to Add Light Noise in Maya



By creating a grayscale RGB image in Photoshop you can choose which areas will receive more light. The light areas of the map are brighter and the black areas are darker.


Step One

Open a new 500 pixel by 500 pixel document in Photoshop with a white background. using the default colors, choose Filter > Render > Clouds. Blur the image by selecting Filter > Blur > Gaussian Blur. Save the image as a jpg file in your Maya project's sourceimages folder.

Step Two

Open your Maya project with a few objects in the scene.

Step Three

Add one spotlight (Create > Lights > Spot Light). Position the light with the Move Tool so it illuminates the scene. Press the t key to access the light's manipulator.

Step Four

Soften the edges of the light by adjusting the Dropoff and Penumbra Angle in the light's Attribute Editor.

Step Five

Click the checker-box next to the Intensity slider. In the Create Render Node box, right-click the File icon and choose Create Texture. This creates a file texture that is UV mapped to the object.

Step Six

In the Attribute Editor, under file tab, click the folder icon next to the image name and navigate to find your jpg file. Render your image. You may need to adjust the light's cone angle to see the effects.

Decay Note

This method works with the light's Decay Rate set to No Decay. If you want to add a map and use Decay, then attach the map to the light's color channel. The Diffuse values may need to be adjusted beyond 1.0.


Stock Photos from 123RF