This issue tracks issues specific to the Vulkan (Forward) Mobile backend (such as bugs and undocumented missing features), regardless of the host platform.

See also #39033, which is specific to Android-only issues. See also #66458, which is specific to issues only present in the 4.x OpenGL renderer.

Bugs

• Shader per-instance uniform error spam if more than 1 mesh with that material is used in the editor #55253
• Vulkan Mobile backend: LightmapGI is not sampled during rendering if a DirectionalLight3D with shadows enabled is visible #55867
• Vulkan Mobile backend: LightmapGI baking does not take environment lighting into account #55868
• Vulkan Mobile backend: Fog is only rendered on the background sky, not 3D objects #55870
• Vulkan Mobile backend: Environment lighting and reflections are twice as dark as they should be #55878
• Vulkan Mobile backend: FXAA and debanding have no effect when enabled #55879
• Vulkan Mobile backend: Point lights can appear brighter (duplicated) depending on the camera angle if there is more than one of the same type in view #55881
• Mobile renderer: Angular Distance (PCSS) does not work with DirectionalLight3D shadows #55882
• Vulkan Mobile backend: Lights don't affect primitive meshes #55892
• Vulkan Mobile backend: Some advanced debug draw modes do nothing when enabled #55900
• Vulkan Mobile backend: Glow behaves inconsistently compared to the clustered backend #55901
• Vulkan mobile backend: Reflection Probe Ambient settings don't work #56555
• Vulkan Mobile backend: Radiance prefiltering worsens rough reflection quality #58631
• Vulkan mobile backend: 1 shaders of type BokehDofRasterShaderRD were never freed #59047
• Vulkan Mobile: Decal and light Cull Mask is not working #65848
• Vulkan Mobile: BaseMaterial3D Rim effect creates a dark dot on the mesh while moving the camera #69908
• Vulkan Mobile: Decals pop away when there are more than 7 decals on a mesh resource (instead of the expected 8) #70231
• Vulkan Mobile: Decals are applied to the 3D manipulation gizmo #70774
• Vulkan Mobile: DirectionalLight3D shadow opacity not working #71606
• Vulkan Mobile: Rendering of dark scenes with spotlight exhibits banding on plain color materials #73401
• Vulkan Mobile: Point rendering casts solid shadows, as opposed to point shadows #73827
• Vulkan Mobile: Clip Children shows a copy of all nodes in the scene #75956
• Vulkan Mobile: Video memory leakage when viewport resizes with a WorldEnvironment and glow enabled #77295
• Mobile Renderer with MSAA not working when using the viewport stretch mode (presents a black screen) #67234
• Mobile/Compatibility: SpotLight and OmniLight cull masks don't cull moving meshes #82263
• Vulkan Mobile: LightmapGI dynamic object lighting results in black objects #84846
• Vulkan Mobile: LightmapGI rendering exhibits pixelation artifacts on Android #85172
• Shadow rendering does not respect cull mode on mobile renderer #87644
• Vulkan Mobile: LightmapGI baking makes environment light twice as dark as it should be #94401

Documentation

• Vulkan Mobile backend: Warn about unsupported features in the editor and class reference #55880

Enhancements

• Cannot use different Rendering Backends(Desktop vs Mobile) from command line #53731
• GeometryInstance3D transparency does not work in mobile or compatibility renderers #76774