Black Spots with Cycles #40099
Labels
No Label
Interest
Alembic
Interest
Animation & Rigging
Interest
Asset Browser
Interest
Asset Browser Project Overview
Interest
Audio
Interest
Automated Testing
Interest
Blender Asset Bundle
Interest
BlendFile
Interest
Collada
Interest
Compatibility
Interest
Compositing
Interest
Core
Interest
Cycles
Interest
Dependency Graph
Interest
Development Management
Interest
EEVEE
Interest
EEVEE & Viewport
Interest
Freestyle
Interest
Geometry Nodes
Interest
Grease Pencil
Interest
ID Management
Interest
Images & Movies
Interest
Import Export
Interest
Line Art
Interest
Masking
Interest
Metal
Interest
Modeling
Interest
Modifiers
Interest
Motion Tracking
Interest
Nodes & Physics
Interest
OpenGL
Interest
Overlay
Interest
Overrides
Interest
Performance
Interest
Physics
Interest
Pipeline, Assets & IO
Interest
Platforms, Builds & Tests
Interest
Python API
Interest
Render & Cycles
Interest
Render Pipeline
Interest
Sculpt, Paint & Texture
Interest
Text Editor
Interest
Translations
Interest
Triaging
Interest
Undo
Interest
USD
Interest
User Interface
Interest
UV Editing
Interest
VFX & Video
Interest
Video Sequencer
Interest
Virtual Reality
Interest
Vulkan
Interest
Wayland
Interest
Workbench
Interest: X11
Legacy
Blender 2.8 Project
Legacy
Milestone 1: Basic, Local Asset Browser
Legacy
OpenGL Error
Meta
Good First Issue
Meta
Papercut
Meta
Retrospective
Meta
Security
Module
Animation & Rigging
Module
Core
Module
Development Management
Module
EEVEE & Viewport
Module
Grease Pencil
Module
Modeling
Module
Nodes & Physics
Module
Pipeline, Assets & IO
Module
Platforms, Builds & Tests
Module
Python API
Module
Render & Cycles
Module
Sculpt, Paint & Texture
Module
Triaging
Module
User Interface
Module
VFX & Video
Platform
FreeBSD
Platform
Linux
Platform
macOS
Platform
Windows
Priority
High
Priority
Low
Priority
Normal
Priority
Unbreak Now!
Status
Archived
Status
Confirmed
Status
Duplicate
Status
Needs Info from Developers
Status
Needs Information from User
Status
Needs Triage
Status
Resolved
Type
Bug
Type
Design
Type
Known Issue
Type
Patch
Type
Report
Type
To Do
No Milestone
No project
No Assignees
6 Participants
Notifications
Due Date
No due date set.
Dependencies
No dependencies set.
Reference: blender/blender#40099
Loading…
Reference in New Issue
No description provided.
Delete Branch "%!s(<nil>)"
Deleting a branch is permanent. Although the deleted branch may continue to exist for a short time before it actually gets removed, it CANNOT be undone in most cases. Continue?
System Information
win7 64bit gtx titan i7
Blender Version
blender-2.70-4a1b877-win64
Short description of error
Not really sure if this is a bug or a bad settings. However changing bounces for any ray type has no effects.
A glossy plane with bump normals shows black spots.
Exact steps for others to reproduce the error
Check the attached file and image. Just press F12
black_spots.blend1
Changed status to: 'Open'
Added subscriber: @dragostanasie
black_spots.blend
Ignore the .blend1 file. I cannot remove it.
Added subscriber: @derekbarker
is the sky black.
Changed status from 'Open' to: 'Archived'
It's a known limitation of bump mapping. Bump mapping is a trick that works up to a point, but if you push it too far then the real geometry of the mesh is revealed and you get problems like this.
We can improve this in some ways, but for now this is not considered a bug.
Added subscriber: @willi-2
@dragostanasie, an option is using sub division modifier(s) + displacement modifier:
Added subscriber: @ConstantinRahn
This limitation is still in 2.75. Can we hope for some development on this topic?
I have had this problem every once a while. And it's posted on BA today, too.
http://blenderartists.org/forum/showthread.php?379147-Skin-in-Cycles-Emily-2-1&p=2924221&viewfull=1#post2924221
Maybe closer to a feature request than a bug.
Added subscriber: @MohamedSakr
hey @brecht , any image about how this happens? "how the ray bounces under a strong normal/bump, and what makes it black (low pdf, etc...", what is the possible work around "other than real geometry displacement"