Join Steve Wright for an in-depth discussion in this video Rendering wireframe images, part of Nuke 8 New Features.
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NUKE 8 now supports true wire frame renders for scanline images. Previously, the only scanline render options were off, solid, and texture. Now, a whole array of wireframe options have been added. Let's take a look. We'll start over here with the wire frame render options. Let's switch to the 3D view so you can see the setup. Got this little geometry thing all texture mapped. Back to our 2D view, and we'll open up the Read Geonode. So we're talking about right here, this rendered field. The old options again were off, solid, and textured.
But here's a whole new set. We can now do a wireframe render, we can do solid plus wireframe, and textured plus wireframe. Now these new render options are supported by either Read Geonode and all the geometric primitives. The geometry node wireframe render ignores lights. If you want to light your wireframes, you need to use the wireframe shader node. So let's take a look at that. I'll clear the property bin, turn on all of this, and open up the Viewer.
Now, the wireframe shader uses lights and offers some interesting additional wireframe visualizationS. The wireframe shader, is located in 3D, shader wireframe. Let's take a look at the 3D set up. Over here, now you see I've got lights. Back to our 2D set up. Let's zoom in. And we'll open up the Wireframe Shader Node. You have a series of operations to chose from. By default, you're going to get the opaque operation, which is the wireframe rendered over solid black, so you can't see through it. The next option of course, is see through, and then there's over, where the wireframe render is composed over your original texture map image. Multiply. This is interesting. It's actually doing a multiply of the white wireframe times your rendered scanline image. See the colors there on the wireframe. And the last one is modulate. This is allowing the shaders to actually affect the wireframe part of the render. Couple of other adjustments you might like to know about, are the linewidth.
You can tap up the width of the lines. I'll set that back to default. And we can also change the color. I'm going to do a Cmd or Ctrl+Click on the color picker here to get the old one. So I can pick a nice green off the palette chips. Now here's an important tip. I'm going to open up the Read Geonode. If you have the Render option in the Geometry node set for something like Wireframe, it overrides your Wireframe Shader Node. So don't forget you need to always set this guy for Textured. For the wireframe shader to work properly. At last, we can do wireframe renders of our 3D geometry in NUKE. One big use, it to do a quick renders of 3D optics, to check the size and position. It can be useful for checking texture map line up, and for creating motion graphics.
Note: This course is specifically designed for current Nuke artists who just want to learn about the new features in Nuke. For a more thorough exploration of Nuke 8, check out Steve's Nuke 8 Essential Training course.