https://bugs.kde.org/show_bug.cgi?id=516703
Bug ID: 516703
Summary: After zooming out all layers, the brush becomes very
slow.
Classification: Applications
Product: krita
Version First 5.3.0-beta2
Reported In:
Platform: EndeavourOS
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Brush engines
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
SUMMARY
After zooming out all layers, the brush becomes very slow.
Please download and watch the video for details; there is also a written
description below.
https://tysontan.com/temp/krita_bug_20260225_video.zip
This was discovered by someone else on Windows Krita 5.1.14, and then I
reproduced this bug on my computer.
Both the KRA and video files were provided by the person who informed me. (The
storage was provided with the help of 'Tyson Tan'.)
STEPS TO REPRODUCE
1.Download and open the .kra file.
https://tysontan.com/temp/krita_bug_20260225_kra.zip
2. Switch to the 'Wet Knife' brush and set the size to 260px or larger.
3. Use the 'Wet Knife' brush to paint.
4. Scale the width of all layers to 9000px.
5. Wait for completion.
6. Use the 'Wet Knife' brush to paint.
OBSERVED RESULT
The brush is much slower than before scaling all the layers.
EXPECTED RESULT
The brush won't slow down much just because all layers are scaled.
OS VERSIONS
Operating System: EndeavourOS
KDE Plasma Version: 6.6.0
KDE Frameworks Version: 6.23.0
Qt Version: 6.10.2
Kernel Version: 6.18.9-arch1-2 (64-bit)
Graphics Platform: Wayland
ADDITIONAL INFORMATION
Krita
Version: 5.3.0-beta2 (git d52d3cf)
Hidpi: true
Qt
Version (compiled): 5.15.7
Version (loaded): 5.15.7
OS Information
Build ABI: x86_64-little_endian-lp64
Build CPU: x86_64
CPU: x86_64
Kernel Type: linux
Kernel Version: 6.18.9-arch1-2
Pretty Productname: EndeavourOS
Product Type: endeavouros
Product Version: unknown
Desktop: KDE
Appimage build: Yes
Locale
Languages: zh_CN
C locale: zh_CN.UTF-8
QLocale current: zh
QLocale system: zh
QTextCodec for locale: UTF-8
OpenGL Info
Qt Platform Name: "xcb"
Vendor: "Intel"
Renderer: "Mesa Intel(R) UHD Graphics 620 (KBL GT2)"
Driver version: "4.6 (Core Profile) Mesa 25.3.5-arch1.1"
Shading language: "4.60"
Requested format: QSurfaceFormat(version 3.3, options
QFlags<QSurfaceFormat::FormatOption>(), depthBufferSize 24, redBufferSize 8,
greenBufferSize 8, blueBufferSize 8, alphaBufferSize 8, stencilBufferSize 8,
samples -1, swapBehavior QSurfaceFormat::DoubleBuffer, swapInterval 0,
colorSpace QSurfaceFormat::DefaultColorSpace, profile
QSurfaceFormat::CompatibilityProfile)
Current format: QSurfaceFormat(version 4.6, options
QFlags<QSurfaceFormat::FormatOption>(), depthBufferSize 24, redBufferSize 8,
greenBufferSize 8, blueBufferSize 8, alphaBufferSize 8, stencilBufferSize 8,
samples -1, swapBehavior QSurfaceFormat::DoubleBuffer, swapInterval 0,
colorSpace QSurfaceFormat::DefaultColorSpace, profile
QSurfaceFormat::CoreProfile)
GL version: 4.6
Supports deprecated functions false
Is OpenGL ES: false
supportsBufferMapping: true
supportsBufferInvalidation: true
forceDisableTextureBuffers: false
Extensions:
GL_ARB_copy_image
GL_ARB_sampler_objects
GL_ARB_transform_feedback2
GL_EXT_texture_sRGB
GL_ARB_viewport_array
GL_ARB_texture_filter_anisotropic
GL_ANGLE_texture_compression_dxt5
GL_ARB_texture_compression_rgtc
GL_ARB_map_buffer_alignment
GL_ARB_sample_shading
GL_ARB_copy_buffer
GL_ARB_fragment_coord_conventions
GL_ARB_spirv_extensions
GL_EXT_texture_storage
GL_ARB_shader_texture_image_samples
GL_ARB_framebuffer_sRGB
GL_ARB_vertex_array_object
GL_ARB_texture_query_levels
GL_ARB_texture_float
GL_EXT_framebuffer_multisample
GL_AMD_vertex_shader_viewport_index
GL_ARB_gpu_shader_int64
GL_ANGLE_texture_compression_dxt3
GL_ARB_texture_mirror_clamp_to_edge
GL_ARB_derivative_control
GL_NV_conditional_render
GL_S3_s3tc
GL_EXT_texture_swizzle
GL_EXT_draw_instanced
GL_ARB_texture_stencil8
GL_EXT_texture_shared_exponent
GL_ARB_timer_query
GL_EXT_vertex_array_bgra
GL_ARB_shader_precision
GL_ARB_instanced_arrays
GL_AMD_shader_stencil_export
GL_ARB_vertex_type_10f_11f_11f_rev
GL_EXT_framebuffer_blit
GL_ARB_separate_shader_objects
GL_ARB_buffer_storage
GL_EXT_abgr
GL_EXT_polygon_offset_clamp
GL_ARB_shader_clock
GL_ARB_draw_indirect
GL_EXT_timer_query
GL_KHR_blend_equation_advanced
GL_EXT_transform_feedback
GL_ARB_query_buffer_object
GL_ARB_vertex_array_bgra
GL_EXT_texture_snorm
GL_ARB_explicit_attrib_location
GL_EXT_texture_filter_anisotropic
GL_ARB_shader_subroutine
GL_ARB_texture_storage
GL_ARB_shader_ballot
GL_EXT_EGL_image_storage
GL_EXT_blend_equation_separate
GL_ARB_sync
GL_EXT_pixel_buffer_object
GL_MESA_pack_invert
GL_ARB_point_sprite
GL_ARB_texture_query_lod
GL_ARB_shader_storage_buffer_object
GL_ARB_transform_feedback_instanced
GL_ARB_blend_func_extended
GL_ARB_shading_language_include
GL_ARB_multi_bind
GL_EXT_packed_depth_stencil
GL_ARB_seamless_cubemap_per_texture
GL_EXT_framebuffer_sRGB
GL_EXT_texture_sRGB_decode
GL_NV_compute_shader_derivatives
GL_ARB_draw_elements_base_vertex
GL_ARB_texture_swizzle
GL_EXT_EGL_sync
GL_ARB_enhanced_layouts
GL_ARB_vertex_shader
GL_EXT_memory_object_fd
GL_ARB_draw_buffers
GL_AMD_multi_draw_indirect
GL_EXT_shader_clock
GL_ARB_map_buffer_range
GL_INTEL_blackhole_render
GL_NV_depth_clamp
GL_ARB_pixel_buffer_object
GL_EXT_shader_samples_identical
GL_ARB_cull_distance
GL_EXT_memory_object
GL_EXT_shader_framebuffer_fetch
GL_AMD_query_buffer_object
GL_EXT_framebuffer_multisample_blit_scaled
GL_INTEL_conservative_rasterization
GL_ARB_occlusion_query2
GL_ARB_transform_feedback3
GL_ARB_compute_shader
GL_ARB_conservative_depth
GL_ARB_draw_buffers_blend
GL_ARB_fragment_shader
GL_EXT_texture_array
GL_MESA_texture_const_bandwidth
GL_EXT_framebuffer_object
GL_KHR_context_flush_control
GL_EXT_texture_shadow_lod
GL_ARB_gpu_shader_fp64
GL_ARB_shader_image_size
GL_ARB_vertex_attrib_binding
GL_ARB_compute_variable_group_size
GL_ARB_gpu_shader5
GL_KHR_texture_compression_astc_sliced_3d
GL_ARB_half_float_vertex
GL_ARB_texture_rectangle
GL_ARB_vertex_attrib_64bit
GL_ARB_shader_viewport_layer_array
GL_ARB_gl_spirv
GL_ARB_robustness
GL_ARB_ES3_compatibility
GL_EXT_draw_buffers2
GL_ARB_texture_storage_multisample
GL_ARB_pipeline_statistics_query
GL_INTEL_performance_query
GL_MESA_texture_signed_rgba
GL_ARB_robust_buffer_access_behavior
GL_ARB_shader_group_vote
GL_ARB_ES3_2_compatibility
GL_KHR_robust_buffer_access_behavior
GL_AMD_gpu_shader_int64
GL_ARB_texture_filter_minmax
GL_EXT_vertex_attrib_64bit
GL_ATI_texture_float
GL_ARB_texture_multisample
GL_NV_copy_image
GL_EXT_texture_compression_dxt1
GL_ARB_shader_texture_lod
GL_OES_EGL_image
GL_ARB_shader_atomic_counter_ops
GL_ARB_internalformat_query2
GL_EXT_provoking_vertex
GL_KHR_robustness
GL_ARB_compressed_texture_pixel_storage
GL_KHR_texture_compression_astc_ldr
GL_ARB_texture_cube_map_array
GL_ARB_shader_bit_encoding
GL_ARB_uniform_buffer_object
GL_EXT_shader_integer_mix
GL_ARB_explicit_uniform_location
GL_ARB_shader_draw_parameters
GL_ARB_debug_output
GL_AMD_depth_clamp_separate
GL_AMD_shader_trinary_minmax
GL_KHR_blend_equation_advanced_coherent
GL_EXT_EGL_image_storage_compression
GL_INTEL_shader_integer_functions2
GL_ATI_blend_equation_separate
GL_ARB_clip_control
GL_ARB_polygon_offset_clamp
GL_AMD_draw_buffers_blend
GL_EXT_shader_framebuffer_fetch_non_coherent
GL_ARB_ES3_1_compatibility
GL_AMD_vertex_shader_layer
GL_ARB_shader_stencil_export
GL_ARB_draw_instanced
GL_ARB_texture_view
GL_AMD_conservative_depth
GL_ARB_arrays_of_arrays
GL_ARB_tessellation_shader
GL_ARB_texture_rg
GL_EXT_demote_to_helper_invocation
GL_INTEL_shader_atomic_float_minmax
GL_ARB_half_float_pixel
GL_KHR_parallel_shader_compile
GL_ARB_seamless_cube_map
GL_ARB_provoking_vertex
GL_NV_packed_depth_stencil
GL_ARB_direct_state_access
GL_ARB_indirect_parameters
GL_ARB_conditional_render_inverted
GL_AMD_seamless_cubemap_per_texture
GL_ARB_depth_buffer_float
GL_ARB_shader_atomic_counters
GL_AMD_pinned_memory
GL_ARB_texture_compression_bptc
GL_ARB_texture_gather
GL_MESA_framebuffer_flip_y
GL_ARB_program_interface_query
GL_EXT_texture_integer
GL_IBM_multimode_draw_arrays
GL_ARB_fragment_shader_interlock
GL_ARB_depth_clamp
GL_ARB_vertex_type_2_10_10_10_rev
GL_MESA_shader_integer_functions
GL_ARB_shader_objects
GL_NV_fragment_shader_interlock
GL_3DFX_texture_compression_FXT1
GL_ARB_ES2_compatibility
GL_ARB_transform_feedback_overflow_query
GL_ARB_internalformat_query
GL_ARB_texture_buffer_range
GL_ARB_get_program_binary
GL_EXT_debug_label
GL_AMD_performance_monitor
GL_ARB_multi_draw_indirect
GL_ARB_fragment_layer_viewport
GL_AMD_texture_texture4
GL_EXT_semaphore_fd
GL_EXT_texture_compression_rgtc
GL_ARB_clear_buffer_object
GL_KHR_debug
GL_ARB_texture_non_power_of_two
GL_EXT_packed_float
GL_ARB_get_texture_sub_image
GL_ARB_vertex_buffer_object
GL_ARB_framebuffer_no_attachments
GL_ARB_texture_border_clamp
GL_NV_alpha_to_coverage_dither_control
GL_ARB_shading_language_packing
GL_ARB_framebuffer_object
GL_ARB_shader_image_load_store
GL_EXT_texture_sRGB_R8
GL_ARB_texture_rgb10_a2ui
GL_ARB_clear_texture
GL_ARB_texture_buffer_object_rgb32
GL_NV_texture_barrier
GL_EXT_texture_compression_s3tc
GL_ARB_stencil_texturing
GL_ARB_shading_language_420pack
GL_ARB_texture_barrier
GL_ARB_post_depth_coverage
GL_EXT_semaphore
GL_ARB_texture_buffer_object
GL_ARB_parallel_shader_compile
GL_ARB_invalidate_subdata
GL_KHR_no_error
GL_ARB_base_instance
QPA OpenGL Detection Info
supportsDesktopGL: true
supportsOpenGLES: true
isQtPreferOpenGLES: false
Detected renderers:
(Supported) Mesa Intel(R) UHD Graphics 620 (KBL GT2) (4.6 (Core Profile)
Mesa 25.3.5-arch1.1)
(Supported) Mesa Intel(R) UHD Graphics 620 (KBL GT2) (OpenGL ES 3.2 Mesa
25.3.5-arch1.1)
useBufferInvalidation (config option): false
Hardware Information
GPU Acceleration: auto
Memory: 15880 Mb
Number of Cores: 8
Swap Location: /tmp
Built for: sse2
Base instruction set: fma3+avx2
Supported instruction sets: fma3+avx2 avx2 fma3+avx avx fma3+sse4.2 sse4.2
sse4.1 ssse3 sse3 sse2
Current Settings
Current Swap Location: /tmp
Current Swap Location writable: true
Undo Enabled: true
Undo Stack Limit: 200
Use OpenGL: true
Use OpenGL Texture Buffer: true
Disable Vector Optimizations: false
Disable AVX Optimizations: false
Canvas State: OPENGL_SUCCESS
Autosave Interval: 420
Use Backup Files: true
Number of Backups Kept: 1
Backup File Suffix: ~
Backup Location: Same Folder as the File
Backup Location writable: false
Resource Location: /home/xi/.local/share/krita
Use Win8 Pointer Input: false
Use RightMiddleTabletButton Workaround: false
Levels of Detail Enabled: false
Use Zip64: false
Loaded Python Plugins
colorspace
comics_project_management_tools
documenttools
exportlayers
filtermanager
lastdocumentsdocker
mutator
plugin_importer
quick_settings_docker
scripter
tenbrushes
tenscripts
workflow_buttons
Display Information
Number of screens: 1
Screen: 0
Name: eDP-1
Depth: 24
Scale: 1
Physical DPI201.061
Logical DPI129
Physical Size: 285, 190
Position: 0, 0
Resolution in pixels: 2256x1504
Manufacturer:
Model:
Refresh Rate: 59.9781
Serial Number:
---------------------
================================================================================
SESSION: 25 Feb 2026 15:35:45 +0800. Executing
/tmp/.mount_krita.ggNalf/usr/bin/krita
Krita Version: 5.3.0-beta2 (git d52d3cf), Qt version compiled: 5.15.7, loaded:
5.15.7. Process ID: 3640
-- -- -- -- -- -- -- --
25 Feb 2026 15:35:45 +0800: Style: fusion. Available styles: Windows, Fusion
25 Feb 2026 15:35:46 +0800: Database is up to date. Version: 0.0.18, created by
Krita 5.3.0-beta2, at 周二 2月 24 12:46:38 2026
25 Feb 2026 15:35:46 +0800: INFO: detected unstable build of Krita,
foreign_keys constraint will be enabled
25 Feb 2026 15:35:46 +0800: INFO: switch foreign_keys state: 0 -> 1
25 Feb 2026 15:35:48 +0800: Audio Playback Engine: KisPlaybackEngineQT
25 Feb 2026 15:35:59 +0800: Importing application/x-krita to
application/x-krita. Location: /home/xi/下载/2.6.kra. Real location:
/home/xi/下载/2.6.kra. Batchmode: 0
25 Feb 2026 15:36:26 +0800: Loaded image from application/x-krita. Size: 18000
* 12731 pixels, 4.16667 dpi. Color model: 8 位整数/通道 RGB/透明度
(sRGB-elle-V2-srgbtrc.icc). Layers: 38
25 Feb 2026 15:36:29 +0800: WARNING: /home/xi/下载/2.6.kra is running out of
memory:图像数据大小：11.9 GiB
・图层： 11.0 GiB
・视图： 876.8 MiB
・笔刷预渲染：0 B
内存占用情况：5.1 GiB / 12.4 GiB
・图像数据： 0 B / 12.4 GiB
・内存池： 0 B / 0 B
・撤销数据： 0 B
交换数据总量：0 B
25 Feb 2026 15:39:03 +0800: Created image "未命名", 2480 * 3508 pixels, 300 dpi.
Color model: 8 位整数/通道 RGB/透明度 (sRGB-elle-V2-srgbtrc.icc). Layers: 2
---------------------
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