I have seen the new Cinema 4D rendering engine for Vectorworks mentioned in reviews as not much more than a bullet point. Yet the new rendering engine is leaps and bounds beyond what was previously called Renderworks that it is almost like a whole new piece of software and certainly deserving of an independent review. In fact, the system is now so robust that Nemetschek would do its customers a great service by adding a getting started guide just for Renderworks to go into better detail about the functionality of the system.
The new rendering engine is so much more powerful, in fact, that I ran into a few problems right off the bat. Nemetschek claims that their new engine is many times faster than the old one. Yet when I did a side by side Final Quality Renderworks test the new engine took much longer to produce its result. Curious I looked further into this and discovered that the actual image was much better quality and, in order to get a quality equivalent to the old FQR, I had to set everything in custom to “Low Quality” and turn off Ray Tracing. Then the engine was faster. In short, the only way to get a true apples to apples comparison is to put the new RW on its lowest settings and the old Renderworks on its highest settings.
What’s that Ray Tracing thing he mentioned?
That’s right, the new Renderworks adds Ray Tracing functionality, meaning you can set how many times an individual photon bounces off objects. This gives renderings a more natural quality as bounce light is included in the rendering of the final image. This does increase rendering time and can cause a simple scene to take a fair amount of time to render. But you definitely get what you pay for. A little more time for a much higher quality rendering is, in my opinion, worth the wait.
One of the first things I did with the new Renderworks was rerender my lighthouse drawing. Here is where I hit the first, and only real snag, in the new system. Because the rendering engine deals with light and textures in an entirely new manner, the old textures did not map properly. As such, I had to rebuild my textures from scratch. This will cause some users a bit of frustration during the initial upgrade, but the final results will be well worth it.
A side by side comparison of my rendering of the lighthouse in RW2010 and RW2011
As you can see from the above comparisons not only are the shadows softer and more true but the detail in the drafting is much clearer. I did not change any of the physical drafted objects for the rerender. Only lighting sources and textures were changed.
The new Renderworks allows the importation of HDR images from which lighting information can be extracted and used for lighting your 3D models. Several HDRIs are included with the basic RW package and the user can import their own as well. Not only can this be a quick way to mock up basic lighting conditions, it also allows for the creation of really nice looking white models.
Turning off Textures and Colors in the Custom RW palette and then turning off ambient light from the Lighting Options Palette, setting indirect lighting to one bounce and Environmental lighting to HDRI white can give results like this:
Whitemodel of my 3D drafting of a house built from shipping containers. HDRI Environmental lighting and one directional light source.
In addition to vastly improved lighting options, the texturing capabilities of Renderworks 2011 are significantly improved. While imports of older files will require a rebuild of the textures, the user should find this worth the effort. Not only are simple colored textures improved, but the bumpmapping is better as well. One thing that could use some improvement is the transparency function. I have yet to find a suitable combination of settings which give adequate results for something like a translucent fabric.
The ability to add Decals allows for greater dynamic range of rendering options as well. A decal is an image file placed on top of an object with another texture. This allows the user to put graffiti or a poster on a wall for example.
Emitter options allow the user to set a reference white color temperature for light emitting objects. This is useful in a number of ways, not the least of which is when creating a texture that emits light allowing one to approximate fluorescent tubes, video screens, or lit walls.
Along with the new and expanded tools in the lighting and texturing areas. The artistic Renderworks options are newly redesigned as well. Users who are familiar with the old functionality of the Artistic RW settings will need to adapt to the new system, but the options are robust and give interesting and useful options for rendering one’s drawings.
Obviously the new Renderworks Cinema 4D engine is primarily of interest to those users who draw in 3D regularly. However, given the improvements in the 3D drawing environment in Vectorworks 2011, I expect an increasing number of users to begin working in 3D and using the new rendering engine.
Quick 3D sketch with Background image and Decal. Background image courtesy SnaPsi
