SUMMARY tldr: the eraser tool doesn't clear the RGB channels when using it. I'm working with a game engine which expects the alpha channel to be correct, even when viewing a image. Krita doesn't seem to work good with the RGB/alpha channels and it seems as though there is an optimization to rely only on the transparency mask instead. This causes issues when I deliver images I create with Krita -- the images don't look good and have left over data in the RGB/alpha channels (affecting teams using the images in the game editor), even though the image renders great when applying the transparency mask. STEPS TO REPRODUCE 1. New image (RGB/Alpha 8-bit) - 2 layers with background defined 2. Using drawing tool (stylus) and Basic-brush, select a solid color and draw a circle. Fill in the circle using the same brush 3. Using Eraser Circle brush, clean up about 2-10 pixels all around the edge of the circle to make the edges look more crisp. Also draw a smile in the center of the circle using the eraser. 4. Now hide the background layer (not needed, just useful) 5. Right click on the Paint layer 1 and select "Split Alpha" -> "Alpha into Mask" 6. Now hide the transparency mask OBSERVED RESULT The original content data where you erased the image remains in all RGB and Alpha channels EXPECTED RESULT Even when I save the image the data that I thought I erased is still in there. The game I contribute to has an editor engine which doesn't render transparency (only in the game mode does it render transparency -- this is to make it easier to manipulate objects in the editor). Having this extra data remain in the image sucks cause now it looks completely incorect. NOTE: If I use a selection tool and press "Delete" to clear, it actually clears all RGB channels and sets the transparency mask. I expect the eraser tool to do this as well. SOFTWARE/OS VERSIONS Krita Version: 5.2.1 Installation type: installer / portable package Hidpi: true Qt Version (compiled): 5.15.7 Version (loaded): 5.15.7 OS Information Build ABI: x86_64-little_endian-llp64 Build CPU: x86_64 CPU: x86_64 Kernel Type: winnt Kernel Version: 10.0.23258 Pretty Productname: Windows 10 Version 2009 Product Type: windows Product Version: 10 Locale Languages: en_US, en, en_Latn_US C locale: C QLocale current: en QLocale system: en QTextCodec for locale: UTF-8 Process ACP: 65001 (UTF-8) System locale default ACP: 1252 (ANSI - Latin I) OpenGL Info Vendor: "Google Inc. (Intel)" Renderer: "ANGLE (Intel, Intel(R) Iris(R) Xe Graphics Direct3D11 vs_5_0 ps_5_0, D3D11-31.0.101.4502)" Driver version: "OpenGL ES 3.0.0 (ANGLE 2.1.0 git hash: f2280c0c5f93+krita_qt5)" Shading language: "OpenGL ES GLSL ES 3.00 (ANGLE 2.1.0 git hash: f2280c0c5f93+krita_qt5)" Requested format: QSurfaceFormat(version 3.0, 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::NoProfile) Current format: QSurfaceFormat(version 3.0, options QFlags<QSurfaceFormat::FormatOption>(), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 8, stencilBufferSize 8, samples 0, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::NoProfile) GL version: 3.0 Supports deprecated functions false Is OpenGL ES: true supportsBufferMapping: true supportsBufferInvalidation: false forceDisableTextureBuffers: true Extensions: GL_ANGLE_base_vertex_base_instance GL_ANGLE_get_serialized_context_string GL_OES_draw_elements_base_vertex GL_ANGLE_texture_multisample GL_EXT_texture_compression_dxt1 GL_OES_compressed_EAC_RG11_signed_texture GL_ANGLE_texture_usage GL_EXT_shader_texture_lod GL_EXT_sRGB GL_KHR_parallel_shader_compile GL_OES_texture_float_linear GL_EXT_color_buffer_float GL_CHROMIUM_bind_generates_resource GL_EXT_color_buffer_half_float GL_OES_texture_stencil8 GL_ANGLE_texture_compression_dxt5 GL_KHR_debug GL_OES_vertex_array_object GL_OES_EGL_image_external GL_ANGLE_lossy_etc_decode GL_WEBGL_video_texture GL_ANGLE_memory_size GL_EXT_blend_func_extended GL_OES_compressed_EAC_RG11_unsigned_texture GL_ANGLE_depth_texture GL_EXT_disjoint_timer_query GL_OES_depth24 GL_CHROMIUM_sync_query GL_ANGLE_copy_texture_3d GL_EXT_map_buffer_range GL_ANGLE_pack_reverse_row_order GL_OES_fbo_render_mipmap GL_EXT_texture_type_2_10_10_10_REV GL_OES_rgb8_rgba8 GL_OES_depth32 GL_ANGLE_framebuffer_blit GL_EXT_frag_depth GL_OES_compressed_ETC2_sRGB8_alpha8_texture GL_EXT_draw_buffers_indexed GL_EXT_texture_compression_s3tc_srgb GL_CHROMIUM_copy_compressed_texture GL_EXT_texture_filter_anisotropic GL_ANGLE_robust_client_memory GL_ANGLE_multi_draw GL_OES_compressed_ETC2_RGB8_texture GL_OES_draw_buffers_indexed GL_NV_pixel_buffer_object GL_ANGLE_program_cache_control GL_EXT_texture_compression_bptc GL_ANGLE_instanced_arrays GL_ANGLE_request_extension GL_EXT_EGL_image_external_wrap_modes GL_ANGLE_client_arrays GL_OES_surfaceless_context GL_EXT_texture_format_BGRA8888 GL_EXT_texture_compression_rgtc GL_EXT_texture_rg GL_EXT_multi_draw_indirect GL_EXT_discard_framebuffer GL_EXT_draw_buffers GL_OES_get_program_binary GL_OES_texture_border_clamp GL_NV_fence GL_OVR_multiview2 GL_OES_compressed_EAC_R11_signed_texture GL_OES_element_index_uint GL_OES_compressed_EAC_R11_unsigned_texture GL_OES_EGL_image_external_essl3 GL_ANGLE_multiview_multisample GL_EXT_texture_storage GL_CHROMIUM_lose_context GL_OES_mapbuffer GL_OES_texture_half_float_linear GL_EXT_instanced_arrays GL_EXT_read_format_bgra GL_OES_texture_npot GL_OES_compressed_ETC2_punchthroughA_RGBA8_texture GL_CHROMIUM_bind_uniform_location GL_EXT_draw_elements_base_vertex GL_ANGLE_provoking_vertex GL_ANGLE_translated_shader_source GL_EXT_float_blend GL_EXT_clip_control GL_EXT_unpack_subimage GL_EXT_robustness GL_OES_EGL_image GL_ANGLE_texture_compression_dxt3 GL_EXT_debug_label GL_EXT_texture_norm16 GL_NV_EGL_stream_consumer_external GL_OVR_multiview GL_AMD_performance_monitor GL_OES_compressed_ETC2_RGBA8_texture GL_EXT_multisampled_render_to_texture GL_ANGLE_framebuffer_multisample GL_NV_framebuffer_blit GL_ANGLE_get_tex_level_parameter GL_OES_texture_half_float GL_OES_compressed_ETC2_sRGB8_texture GL_EXT_blend_minmax GL_OES_standard_derivatives GL_OES_packed_depth_stencil GL_NV_pack_subimage GL_OES_texture_float GL_EXT_occlusion_query_boolean GL_ANGLE_base_vertex_base_instance_shader_builtin GL_CHROMIUM_copy_texture GL_EXT_debug_marker GL_OES_compressed_ETC2_punchthroughA_sRGB8_alpha_texture QPA OpenGL Detection Info supportsDesktopGL: true supportsAngleD3D11: true isQtPreferAngle: true Detected renderers: (Supported) ANGLE (Microsoft, Microsoft Basic Render Driver Direct3D11 vs_5_0 ps_5_0, D3D11-10.0.23258.1000) (OpenGL ES 3.0.0 (ANGLE 2.1.0 git hash: f2280c0c5f93+krita_qt5)) (Supported) ANGLE (Intel, Intel(R) Iris(R) Xe Graphics Direct3D11 vs_5_0 ps_5_0, D3D11-31.0.101.4502) (OpenGL ES 3.0.0 (ANGLE 2.1.0 git hash: f2280c0c5f93+krita_qt5)) (Supported) Intel(R) Iris(R) Xe Graphics (3.3.0 - Build 31.0.101.4502) useBufferInvalidation (config option): false Hardware Information GPU Acceleration: auto Memory: 16208 Mb Number of Cores: 12 Swap Location: C:/Users/markri/AppData/Local/Temp Built for: sse2 Base instruction set: fma3+avx2 Supported instruction sets: fma3+avx2 avx2 fma3+avx avx fma4 fma3+sse4.2 sse4.2 sse4.1 ssse3 sse3 sse2 Current Settings Current Swap Location: C:/Users/markri/AppData/Local/Temp 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: 2 Backup File Suffix: ~ Backup Location: C:/Users/markri/AppData/Local/Temp Backup Location writable: true Resource Location: C:/Users/markri/AppData/Roaming/krita Use Win8 Pointer Input: true Use RightMiddleTabletButton Workaround: false Levels of Detail Enabled: false Use Zip64: false Loaded Python Plugins colorspace comics_project_management_tools documenttools exportlayers filtermanager lastdocumentsdocker plugin_importer quick_settings_docker scripter tenbrushes tenscripts