Creating Natural Light
In this tutorial I'll teach you how to make a light rig that will generate a nice, clean, soft overall light that's tinted green.
Okay - normally you don't use paint effects to light a
scene, but here's an exception. We're going to use paint effects to
generate a picture which will then be assigned to a sphere and sampled
for Final Gather.
Step two - Still on the view port menu bar, go to paint>paint canvas.
Step three - Set the shelf to paint effects.
Select the tree brush on the shelf.
Basically what we're going to do is scribble all over the image until it's completely covered with trees.
We're going to erase one third of the top of the image. To get the Erase Paint Effects brush, open the visor.
Go to the folder Airbrush and select the erase brush. The erasing doesn't have to be even or 100% accurate.
Now that we have our image, on the Paint Effects Canvas menu set, go to paint>save snapshot. Save the file on your hard-drive.
I would like to step back here and explain how this
same technique can be used to generate panoramic images that can be
used in Mental Ray outside this tutorial.
Setting Up The Scene
Of course, we're going to create a new scene all together.
Getting the proper render setting is very important
for getting this lighting tutorial to work. We'll be using Mental Ray
as our rendering software.
Step two - On the Common tab, go to the tag render options and uncheck Enable Default Lighting.
Step four - Go to the Mental Ray tab and set the quality present to
production. Under Secondary Effects, check Final Gather.
Setting Up The Sphere
We're going to create a custom shader for the sphere
that has the paint effects image attached to it. Change the shelf to
- If this doesn't automatically open the attributes editor, open it
now. Under the pShpereShape1 tab, roll down to render stats. Uncheck
primary visible. Now go to the surfaceShader1 tab.
Step five - Beside the text Image Name, click the folder icon. Locate where you saved the paint effects image.
Setting The Area Light's Attributes
Select the area light and open the attributes editor (window>attributes editor).
This is what makes the area light create a soft and even light across the scene in Mental Ray.
This lighting rig is a great rig for showing off a product or a model. You can use this technique and fine tune it to your needs.