What software and tools can I use to quickly create lines over single or multiple photographs that have the effect of disappearing into the distance? Sometimes the line would need to have curves. I would also like the line to reduce opacity as it disappears in the distance.
Take the following base image for example:
The very crude hand drawn example below shows how I would like the line to curve in line with the road. However, I would like the line to be wider in the foreground and become narrower as it disappears in the distance.
The following screenshot shows a one point perspective grid in Adobe Illustrator with a rectangle drawn. I am unsure how to add curves and reduce the opacity over the length of the line. I have tried using the line tool in Ilustrator and increasing the width but this does not work. Rather than drawing a rectangle am I able to draw a line with curves but still obtain the desired effects?
What software packages would enable me to quickly and efficiently perform these tasks over single and multiple photographs?
I have access to a variety of software packages including Autocad, Adobe Illustrator and Inkscape but would consider purchasing other packages.