Nice looking icons. BTW, it is possible to easily improve the quality of the large 256x256 images by increasing the image source size. When setting up the .r3i file, there is a Image Properties panel by the left side of the window - if you increase the image size to 1000x1000 or more, the large icons will be much smoother.

4 out of 5 stars.

3 years later and I hope you have a better computer now.
The tip Vlasta mentioned is true and would greatly improve the quality of your icons.

Novel idea tool of the trade.. implying that icons are like anything you would make with physical tools.

Nice set.