What's Changed Update file_io.py by @zhouzq-thu in https://github.com/marcomusy/vedo/pull/1228 Add lazy initialization for normals (#1231) by @CorpsSansOrganes in https://github.com/marcomusy/vedo/pull/1232 Fix broken example links in add_legend_box() documentation by @CorpsSansOrganes in https://github.com/marcomusy/vedo/pull/1241 Use specialized reader for OME-TIFF files. by @anntzer in https://github.com/marcomusy/vedo/pull/1242 Fix trivial typo. by @anntzer in https://github.com/marcomusy/vedo/pull/1247 Fix: update implementation of Box with bounds input to internally set X/Y/Z lengths by @dbotwinick in https://github.com/marcomusy/vedo/pull/1250 fix: several example urls fixed by @CorpsSansOrganes in https://github.com/marcomusy/vedo/pull/1253 general code cleanup with pylint. add utils.compute_hessian() fix issue #1224 for cells coloring in jupyter notebook for k3d add support for STEP files format (needs opencascade lib) #1222 fix nan case in scalarbar3d() add .rename() method to set any object name. fix bug #1230 in line.find_index_at_position() by @natabma Add lazy initialization for normals (#1231) by @CorpsSansOrganes add chemistry module to represent molecules and proteins fix to Box class by @dbotwinick Soft-breaking Changes Changes that may break existing code whose fixing is trivial: Hard-breaking Changes Changes that will break existing code and need active thinking and some work to adapt None New/Revised Examples examples/pyplot/plot_fxy0.py examples/volumetric/image_editor.py examples/other/pysr_regression.py examples/other/chemistry1.py tests/issues/issue_1230.py New Contributors @CorpsSansOrganes made their first contribution in https://github.com/marcomusy/vedo/pull/1232 @anntzer made their first contribution in https://github.com/marcomusy/vedo/pull/1242 @dbotwinick made their first contribution in https://github.com/marcomusy/vedo/pull/1250 Full Changelog: https://github.com/marcomusy/vedo/compare/v2025.5.3...v2025.5.4