Alpha version, may still have errors.
These are basic floor and wall segments for two-level isometric tiles with 30-degree slopes and internal borders, sized 64x64 pixels. Useful for building your own tilesets on top of them.
For whole tiles (not separate floors and walls), use the objects provided in the svg file outside of the page borders, or alternatively see my other upload:
https://inkscape.org/~apmbcn/%E2%98%85two-level-isometric-tiles-with-30-degree-slopes
For shading masks to use with these tiles, see
https://inkscape.org/~apmbcn/%E2%98%85two-level-isometric-tile-shading-masks
Tiles with 45-degree slopes available here:
https://inkscape.org/~apmbcn/%E2%98%85isometric-tiles-with-45-degree-slopes