Adobe Illustrator is used to help make drawings look good but not make them. It is easy to add color or texture but it is hard to actually make the drawings in it. I would recommend using other software to make the lines for plans and sections and using Adobe Illustrator to make it look good.
I have been able to import an environment and create realistic lighting rather quickly by using the power of GPU rendering. Paired with its ability to create instances of geometry, it makes it easy to render a megacity environment in half the time. One issue with this is the clutter that can be made with connecting nodes.
Octane uses GPU rendering so it takes advantage of the video card.
It gives you a good selection of options to tweak and refine your model rendering.
It can use 3D instances so it doesn't overuse computer resources.
There are plugins that can be incorporated into other 3D packages for rendering.
Octane is particularly inexpensive compared to other 3D render packages.
You are able to copy certain sections of nodes in order to create different iterations of the same environment or model. For example, changing the lighting or camera features.
While Adobe Illustrator CC is one of the only true design software out there, it really stands heads above the other products. It's clean UI and menu structure is easy to navigate.
There's a bit of a learning curve to this software vs other similar tools that can take some time to learn and get familiar with but the amount of functionality that Adobe Illustrator CC offers is quite large compared to simpler tools.
I normally already know how to do whatever I'm trying out, but the documentation (as well as a simple Google search) makes any question quick to resolve. The Adobe boards themselves are a fantastic resource, especially for resolving questions between new programs and iterative releases.
They complement each other, each with its own specific characteristics, but within a marketing sector, an experienced designer knows that the use of these tools in sets makes all the difference. It is possible to combine their uses and create really relevant materials that will bring a great return to the company and in the dissemination of arts with superior quality to the competitors
Although both have their pros and cons, Octane is far less expensive and it allows for more control over the geometry within a scene with better lighting and camera controls.