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Another advantage to Photoshop 13.1 for 3D artists is that it provides every new 3D object you make with a default image based light, also known as an IBL. The advantage of image based lights is two-fold. For one thing you can wrap an environment around a scene, and then for another you can an image based light to simulate multiple lights so you don't have to set up lights all over the place manually. So it can be a real timesaver as well.
We are going to use Photoshop's new default IBL in order to transform our golden bull so far into this variation that has this interplay of light all over the animal's body, and it really helps sell the gold effect. I'll go and switch back to my image in progress here, and I'll click on the bull layer which is my 3D object, and then I'll switch back to my 3D panel. What you want to do if you are working along with me is click on Environment in order to gain access to the image based light, and you'll see it right there, IBL.
What you want to do is turn it on. Now when you're working with existing objects that you have created in the past, then you are just going to get a black light source, which really isn't going to shed any light the scene. To get the new default Image Based Light you need to create a new object, and I am going to do so inside a new File. I'll go up to the File menu and choose the New Command, and I am going to go ahead and dial in a Width value 1280 pixels and a Height value of 720 pixels. It doesn't really matter that much, but it will look good on screen and then I'll go ahead and zoom in on this guy. We want to create a new 3D object.
So I am going to select Mesh from Preset and then I'll select Ring. You can actually select anything you want, but Ring will do. Then I'll click on Create in order to add my ring to the scene. Then I'll click on Current View, and you'll need to switch to the Move tool in order to gain access to 3D tools, and assuming that your 3D mode is set to this first icon rotate the 3D object then you can just go ahead and drag your view of the scene. Now click on Environment in order to see that IBL is turned on by default, and we've got the default Image Based Light right there.
Now what I'm going to do is I'm going to click on this little page icon, and I am going to choose Edit Texture so that we can actually open up this Image Based Light. It's not very big, as you can see here. If I go to the Image menu and choose Image Size Command, you'll note this just has a Width of 512 pixels and a Height of 256 pixels. The great thing about it is that it's a 32-bit per channel image, as you can see up here in the Title tab. It's says RGB/32, and that's going to make for some very nuanced lighting.
To copy this guy just go ahead and press Ctrl+A or Command+A on a Mac and then Ctrl+C or Command+C on the Mac. Now we can go ahead and close that file. I'll switch back to my file in progress here and then I'll go to its IBL option right there, click on the little folder icon, and choose New Texture, and then it will ask me how big do you want to make this file, and I want it to be 512x256 pixels, because that's the size of the item on the clipboard. I also want to go ahead and name this guy.
So I'll call it Default IBL and click OK. You can see that goes ahead and changes the image to entirely white. Now I need to edit it. By once again clicking on a little page icon and choosing Edit Texture and then I'll go ahead and press Ctrl+V or Command+V on the Mac in order to paste it. Now in my case, I'm getting this message telling me that my color profiles don't match it. That doesn't matter one whit. I'll just go ahead and click OK in order to paste the image. Then notice here in the Layers panel that Photoshop paste the image onto a New layer.
We don't need that layer. So I'll go out to the layer menu and choose Flatten Image in order to flatten the artwork and then I'll go ahead and close the image, and click the Yes button to save it here on the PC. That would be the Save button on the Mac, and that will go ahead and return me to my image in progress with the new IBL. Now it looks like we are going to have very dark scene. We are actually not. What we are seeing is the Image Based Light in the background. If you want to hide that image, all you have to do is switch back to the 3D panel and click on one of this other items besides Environment.
I'm going to click on Sunlight in order to select it, and I'm going to reduce the Intensity of my Sunlight to 25%. Now I'll press the M key to switch away from the Move tool so that I get rid of all my 3D gadgets on screen. I'll click on a little Render button here at the bottom of the Properties panel in order to begin the Ray Tracing process, and we can see down here in the lower left corner of the screen that we have got about 13 to 14 minutes--the time seems to be growing--of rendering to look forward to.
So we are going to go ahead and fast forward through the process to the final Ray Tracing. Now we have the final rendered version of the scene. If you compare that to the version I created in advance, you can see that the other version is a little brighter. And that's because, I'll show here, if I click on Environment over here in the 3D panel you can see that I crank the Intensity value for the Image Based Light up to 150%. So you have that degree of control as well. That's how you take the advantage of Image Based Lights as well as the default IBL that accompanies every new object you make inside Photoshop 13.1.
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