I have found a work around for this that doesn't involve exporting from Photoshop, which can reduce the resolution, which in turn creates a poor image trace in Illustrator.
select the image
This inverts the white to black which is readable by the image trace function.
First, add objects for intermediate steps.
If you examine your sample it blends from medium > small > large > small > medium. There are 5 stages to that blend. So you need 5 objects.
Here I've shown the intermediate steps as red circles. And then created the blend. Remember stacking order matters. Blend stack, by default, from the top object to the bottom ...
In the menu of the transform panel, make sure "Scale Strokes and Effects" is unchecked. You should then be able to scale objects without their strokeweights getting changed. As for creating new icons in the style of the ones you already have - just look at the stroke weights and use those values for the new icons.
If you're asking for an automatic way, one-click solution to make strokes in icons from different sources equally thick, that's not going to happen.
I've found myself in the same situation more than once, and pretty much ended up redrawing every single icon from scratch, just to make sure they are done in outlines (not fills), which makes it easier to ...
I do not know if this will work for you, but it's as close as I can think. Perhaps another user will know of a script or better method.
A Scatter Brush -- this assume the objects, like your example are all similar. If they are not similar, disregard everything after this sentence. :) This won't work for anything more than placement reference. I doubt that's ...
For line extension to work on a rotated rectangle, it must still be designated as “Rectangle” in the layers panel.
Rectangles become Paths if you skew them, or unite them with another object. In that case, add a Rectangle, rotate it to the same angle, and centre the two. The line extension will use the Rectangle for the constrain angle.
An ellipse will ...
There's no special term, although you could just call it an outline, and there are several techniques that could be used.
A semi-automated method is to make a copy of the design, make sure everything is ungrouped until there are no groups left, and do Path > Union or use the shortcut Ctrl++
Then do Path > Dynamic Offset or use the shortcut Ctrl+J, and ...
There is no 3D modeler at work in your examples. If you look at your sample images, all the highlights are the same, and you can pick out coins which are identical. This is a clear indicator that there's no actual 3D taking place.
Coins are drawn in a 2D application with perspective, then duplicated and altered slightly.
A quick rough example....
You may ...
Technically speaking you've already done what you set out to do, with blender. But as Scott pointed out the examples you've provided have been drawn from the start in 2D to include a third dimension, and are not actually 3D.
Regarding the "realism", I'd like to point out two things in your examples that stand out to me when compared to your image:
It worked for me by selecting two paths and then directly flattening the selection, without any boolean operation before.
If one end point from one path is overlapping another one from the second path then, when flattening, the points seems to become one.
You could do it in Inkscape (which is free).
Using the Bézier tool set "Triangle in" as the shape, draw a line, and adjust the triangle until it's the shape you want.
Copy it, paste in place, and move it down
Select all, and run the Interopolate extension, set as many steps as required
Create a circle, copy it
Select interpolated strokes + circle
Set the ...
The button did not work for me either.
I have the problem of changing line width when I group two objects and try to scale them together.
An alternative way to scale "grouped objects" is to combine the paths rather than group them. Then scale as per usual.