# Shade Auto-Smooth Original design which lead to current changes: https://projects.blender.org/blender/blender/issues/93551 New proposed changes: https://projects.blender.org/blender/blender/issues/120230 Original problem: * Procedural and Modifiers * Blender already has a robust procedural system with modifiers. * Other procedural features (e.g., auto-smooth) should be integrated with this as much as possible. * Lack of flexibility for advanced users. * You could not interleave auto-smooth with other modifiers. * Auto-smooth doesn't play well with geometry nodes. * Joining objects with different sharpness/angles * Performance: * Custom-normals. * Sharp edge cases. New problem introduced: * The lack of good instancing in Blender makes the shift from object data (mesh) to object a usability/performance regression. * This wouldn't be a problem if Blender had better instancing usability. * We will run into the exact same scenario when we convert the old curves into the new curves and support bevel, extrude, ... Current problems: * To investigate: backwards compatibility conversion. * Object mode action is destructive at the moment [#120230](https://projects.blender.org/blender/blender/issues/120230). * Add/update a modifier instead. * "Shade Smooth" and "Shade Flat" remove the modifier. * Mimic 4.0 UI: * Rename operator to "Shade Auto Smooth". * Options: Auto-Smooth and Angle (leave out advanced options from the modifier). * Auto-smooth needs to be last on stack for some workflows. * Idea: to add a "Stick to Bottom" checkbox. * ~~Dragging the pinned modifier above non-pinned modifiers un-stick it~~ * ~~Dragging a non-pinned modifier below a pinned modifier makes it pinned~~ * Instead of using the GRIP icon we use ICON_NONE for these. (bonus if it can have a tooltip explaining why it can't be moved) * These modifiers are not draggable. Current proposal: * To keep on the object level.