Running the following snippet
region = ImplicitRegion[x - y + z == 0, {{x, -1, 1}, {y, -1, 1}, {z, -1, 1}}];
RegionPlot3D[DiscretizeRegion[region]]
Outputs
I want to have tick marks and to retain the functionality of RegionPlot3D (to be able to change the color, etc.). Any ideas?
Nothing preventing you from using all of the available options to RegionPlot3D
documented here.
RegionPlot3D[DiscretizeRegion[region], PlotTheme -> "Detailed", Mesh -> None,
PlotStyle -> Directive[Red, Opacity[0.75]]]