Animated Mask Modifier creates artifacts when property "invert" is being toggled #52863

New Issue

Łukasz Debita · 2017-09-21T11:06:25+02:00

Łukasz Debita commented

2017-09-21 11:06:25 +02:00

System Information
Windows 10 Home and GeForce GTX 1060 with Max-Q Design

Blender Version
2.79 Official Release 5bd8ac9{F845533}

Short description of error
When "Mask modifier" is on there are some artifacts on the rendered image when property "invert" toggles,
but when Mask Modifier is applied (for invert on or off), everything is OK.

Exact steps for others to reproduce the error
Render 32'th frame, and you will see artifacts, to find them easly apply the modifier and then render again.

**System Information** Windows 10 Home and GeForce GTX 1060 with Max-Q Design **Blender Version** 2.79 Official Release 5bd8ac9{[F845533](https://archive.blender.org/developer/F845533/MaskModifierProblem.blend)} **Short description of error** When "Mask modifier" is on there are some artifacts on the rendered image when property "invert" toggles, but when Mask Modifier is applied (for invert on or off), everything is OK. ![032_MaskModifier_InvertPropertyTogglesInThisFrame.png](https://archive.blender.org/developer/F845538/032_MaskModifier_InvertPropertyTogglesInThisFrame.png) ![032_MaskModifier_Applyed.png](https://archive.blender.org/developer/F845536/032_MaskModifier_Applyed.png) **Exact steps for others to reproduce the error** Render 32'th frame, and you will see artifacts, to find them easly apply the modifier and then render again.

Łukasz Debita commented

2017-09-21 11:06:25 +02:00

Changed status to: 'Open'

Łukasz Debita commented

2017-09-21 11:06:25 +02:00

Added subscriber: @LukaszDebita

ronan ducluzeau commented

2017-09-21 15:44:35 +02:00

Added subscriber: @zeauro

ronan ducluzeau commented

2017-09-21 15:44:35 +02:00

This is a known limitation of Motion Blur that modifiers altering geometry may have an undesired impact.
https://docs.blender.org/manual/en/dev/render/cycles/settings/scene/render/motion_blur.html#options

Mask modifier is not mentioned as an example but warning is valuable for it.

You could choose a Motion Blur that starts on frame instead of centered on frame to avoid problem at specified frames.
Or you could try to animated red/green lights by using animated textures that don't change the geometry.

This is a known limitation of Motion Blur that modifiers altering geometry may have an undesired impact. https://docs.blender.org/manual/en/dev/render/cycles/settings/scene/render/motion_blur.html#options Mask modifier is not mentioned as an example but warning is valuable for it. You could choose a Motion Blur that starts on frame instead of centered on frame to avoid problem at specified frames. Or you could try to animated red/green lights by using animated textures that don't change the geometry.

Joshua Leung commented

2017-09-25 02:50:49 +02:00

Added subscribers: @Blendify, @JoshuaLeung

Joshua Leung commented

2017-09-25 02:50:49 +02:00

Changed status from 'Open' to: 'Archived'

Joshua Leung closed this issue

2017-09-25 02:50:49 +02:00

Joshua Leung self-assigned this 2017-09-25 02:50:49 +02:00

Joshua Leung commented

2017-09-25 02:50:49 +02:00

Closing. This sounds like a known limitation with geometry-altering modifiers and motion blur.

@Blendify : Maybe the docs should be updated to also note that the Mask Modifier may also cause similar problems?

Closing. This sounds like a known limitation with geometry-altering modifiers and motion blur. @Blendify : Maybe the docs should be updated to also note that the Mask Modifier may also cause similar problems?

Aaron Carlisle commented

2017-09-25 04:27:51 +02:00

Yeah sure, I will put it on my todo for Wednesday.

Sign in to join this conversation.

No Label

Download

What's New

Blender Studio

Manual

Developers Blog

Documentation

Benchmark

Blender Conference

Development Fund

One-time Donations

Animated Mask Modifier creates artifacts when property "invert" is being toggled #52863