From MagiC 3 onwards a 3D-look is available for objects, which however differs in some details from the Atari variant. The most important points is summary:
The 3D-look is only available in resolutions with at least 16 colours
While in TOS 4.0 one can use objc_sysvar to influence the behaviour of indicators and activators as well as colours, MagiC permits only interrogation of the data. For the colours, MagiC always uses colour numbers 8 and 9 (light or dark grey).
Activators are always shown as depressed for SELECTED, while indicators or background objects are colourized
Indicators and background objects are treated in the same way
3D effects can be applied to all object types, which includes text input fields, headings, group frames etc.
3D objects do not get an additional border and hence do not alter their size. Depending on the border width they stand out better, and in some circumstances may also have an additional border and shadow. The headings should have a height of 1+3 instead of the previous 1+2, so that everything looks tidy.
The object status DRAW3D is ignored
Ornamental borders for dialog boxes will be created only if an inner border of 2 pixels and OUTLINED was selected
See also: About the AES GEM Style guidelines