Lattice Modifier Slowdown even when hidden or unassigned #105268

New Issue

Gabriel Moro · 2023-02-27T20:16:31+01:00

Gabriel Moro commented

2023-02-27 20:16:31 +01:00

System Information
Operating system: Windows-10-10.0.22621-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 4090/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 528.24

Blender Version
Broken: version: 3.4.1, branch: blender-v3.4-release, commit date: 2022-12-19 17:00, hash: rB55485cb379f7
Worked: (newest version of Blender that worked as expected)

Short description of error
Lattice Modifier slows down the object even when there's no lattice object attached to it. And disabling it from the list doesn't change this.

Exact steps for others to reproduce the error
Move the object in the file, disable Lattice, move, delete Lattice, move and see the difference.

*********** ISSUE ABOVE RESOLVED, NEW ISSUE BELOW ********
*********** ISSUE ABOVE RESOLVED, NEW ISSUE BELOW ********
*********** ISSUE ABOVE RESOLVED, NEW ISSUE BELOW ********

These are 2 other issues related to the Lattice Modifer that are the following:

When objects have lattice modifiers that are Disabled from the Viewport they still get calculated and slow down animation.
Another problem is: Having static Lattice Modifiers (either by disabling or deleting animation) also brings down the FPS in the same amount. In this case, from 24 fps to 6. Problem might be related.

I'm only reporting the second problem because I don't know how a modifier that is just supposed to deform the mesh has so much impact on the animation, so it feels like a bug.

I made the file very small so you can see the issue by disabling / enabling the Modifiers on the head.
To clean all disabled modifiers I used the script:

import bpy

Get a list of all selected objects

selected_objects = bpy.context.selected_objects

Iterate over the selected objects

for obj in selected_objects:

Check if the object has any modifiers

if len(obj.modifiers) > 0:
# Iterate over the object's modifiers
for modifier in obj.modifiers:
# If the modifier is disabled, delete it
if not modifier.show_viewport:
obj.modifiers.remove(modifier)

**System Information** Operating system: Windows-10-10.0.22621-SP0 64 Bits Graphics card: NVIDIA GeForce RTX 4090/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 528.24 **Blender Version** Broken: version: 3.4.1, branch: blender-v3.4-release, commit date: 2022-12-19 17:00, hash: `rB55485cb379f7` Worked: (newest version of Blender that worked as expected) **Short description of error** Lattice Modifier slows down the object even when there's no lattice object attached to it. And disabling it from the list doesn't change this. **Exact steps for others to reproduce the error** Move the object in the file, disable Lattice, move, delete Lattice, move and see the difference. *********** ISSUE ABOVE RESOLVED, NEW ISSUE BELOW ******** *********** ISSUE ABOVE RESOLVED, NEW ISSUE BELOW ******** *********** ISSUE ABOVE RESOLVED, NEW ISSUE BELOW ******** These are 2 other issues related to the Lattice Modifer that are the following: - When objects have lattice modifiers that are Disabled from the Viewport they still get calculated and slow down animation. - Another problem is: Having static Lattice Modifiers (either by disabling or deleting animation) also brings down the FPS in the same amount. In this case, from 24 fps to 6. Problem might be related. I'm only reporting the second problem because I don't know how a modifier that is just supposed to deform the mesh has so much impact on the animation, so it feels like a bug. I made the file very small so you can see the issue by disabling / enabling the Modifiers on the head. To clean all disabled modifiers I used the script: import bpy # Get a list of all selected objects selected_objects = bpy.context.selected_objects # Iterate over the selected objects for obj in selected_objects: # Check if the object has any modifiers if len(obj.modifiers) > 0: # Iterate over the object's modifiers for modifier in obj.modifiers: # If the modifier is disabled, delete it if not modifier.show_viewport: obj.modifiers.remove(modifier)

LATTICE_Slowdown_Hidden.blend

13 MiB

Blender_ [C__Users_NPC Tech_Google Drive_Think Tank Classes_200 3D MODELING_BLENDER_Youre_Alive_v499_DreamCatcher.blend] 2023-06-07 17-54-54.mp4

13 MiB

Gabriel Moro added the

labels 2023-02-27 20:16:32 +01:00