Let's begin with a simple. I often use 2D program. If we talk about raster processing, I use photoshop. For photo editing, or to improve renderings of 3D programs etc.
Like this render:
Vector little more interesting. I have not very well relationship with the drawing program (2d), because I draw sketches by hand, and then immediately translate them into 3D. But! Sometimes I use CorelDraw for tracing raster to vector! For example, when I want to get the paths for cutting or laser engraving.
Raster-to-vector process:
Next on plan - 3d.
Usually I use SolidWorks for designing in 3d. There are a lot of lessons of SolidWorks designing. Sometimes it's very helpful!
This is a possible designes of a deck.
This is a last one. With transparant elements.
Exploded view drawing:
SolidWorks package has many powerful tools. One of which - PhotoView.
Rendered chassis element:
Also, I really like SolidWorks Simulation. This tool allows you to study, monitor and visualize the load on your device. Because I'm developing longboard, I need to very accurately calculate the possibility of the deck and other parts.
Simulation longboard deck turning with the weight of the rider.:
I also decided to try the new. And I tested cloud-based Fusion360 by Autodesk.
Fusion'ed wheel:
Simulation in Fusion360:
A very important part of my device is the control panel. It allows you to control speed and braking. I haven't yet started to design this panel, but I have recently developed a housing of the device consisting of a board inertial navigation, bluetooth LE module, button, and two lipo. I think I'll do something similar for the control board.
For 2D-modeling I'm using CorelDRAW and INKSCAPE.
First one is a commercial software, second one - is free to dowmload.
But Corel has a lot of features.
Both of them very simple and easy to understanding how it works.
Usually i'm using (as I wrore before) 2d-vector software just for fixind DXF-contours of moleds.
After, when I imported DXF of the deck design to Inkscape, I've been removing unnecessary contours.
After that I got ready cutting vectors for sandpaper (on top of the longboard).