Questions tagged [drivers]

Questions related to drivers. Drivers are used to control one property with another. Drivers can also use python expressions to give even more possibilities, e.g. *#frame/2* will give the current frame divided by two.

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18 views

Problem with bone disconnecting during animation

I have difficulty articulating my thought, so please be patient with me. I am having issue of child bone disconnecting from parent bone eventhough they are "connected" during animation/posing (ref ...
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90 views

Blender not running with software opengl

I'm trying to run blender(2.80) from windows 2016 server with 2x nvidia tesla v100 and a matrox g200he3(?). When I try to run it(in RDP and VNC), I get the opengl version higher than 3.3 message. I ...
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31 views

How can i get the Driver Value? (which is displayed in Debug info)

Hellow, Please tell me how to get the value of the driver, which is displayed in Debug info. blender 2.79. F-Curve.evaluate(frame) - this value after all modifications, and I need what is in this case ...
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24 views

IK leg acts as FK when Torso is transformed on the z axis

I found the following rig the Blend file on sketchfab and tweaked while following DanPro advanced rigging tutorials. Then I noted that I have a strange issue with the rig, and I'm curious as for ...
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27 views

Blender 2.80 crashing when I try to open it?

I have installed blender 2.79 before but when I try download Blender 2.80, unzip and try to open it it's just closes like crash without say anything or any error. When I tried to uninstall the last ...
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24 views

Bake Dolly Camera Rig Add-on animation for sheepit rendering

I'm trying to bake camera drivers using Object/Animation/Bake Action/Object and then the Dolly Rig using Pose/Animation/Bake Action/Pose But when I reload the file without the 'Auto Run Python ...
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36 views

please help me with the drivers

help me with the drivers please i am trying to make the wheel rotate always forward using drivers but when i change the Direction of the variable (cube ) , the wheel start to rotate in the negative ...
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149 views

Can I control a Particle System seed with a driver in Blender 2.8?

I am creating a series of randomized scenes for a D&D Battle Map project. I would like to do as little effort as possible, naturally, so I am trying to generate a few instances of the same scene ...
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1answer
83 views

Control MixShader value by shape key value

I have a Mix Shader mixing two textures and one shape key applied to an object. I want to control the mix shader value from the shape key slider. I think this is achievable by using drivers but i ...
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29 views

Drivers / Constraints resourses usage

I'm trying to optimize the rig of a cartoon creature, and this rig has really large amount of bones (more than 400) to have all the abilities according to the plot. I have IK/FK chains, Stretch To ...
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1answer
141 views

Copy drivers from one Armature to another of the same kind

I have a mesh/armature combo, which I developed in a good amount of steps. The first iteration has drivers for bones which drive other bones of the armature. While developing the neither the armature ...
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1answer
270 views

I can't add drivers

So, I know how to add drivers, but for some reason it is not working at all. I go to my object and hover over rotation on the Z axis, then I press ctrl+d and choose Single from target and the problem ...
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1answer
140 views

Driver bone not working

For some odd reason I can't get my driver bone to work. I've followed tutorials, but whenever I move the bone on the Z axis (local) to control whether my eye opens or closes, it doesn't do anything. :-...
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1answer
143 views

How do you use drivers to hide an object or mesh?

instead of going into the outliner I would like to use the properties tab to change meshes. I've tried to look for some tutorials but most of them are on shape keys. For example; skin 1 is hidden and ...
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33 views

Assign more than 2 shape keys to same object bone

Initially I had 2 shape keys for my eyebrows which I used as a driver using a bone z location (-3*var and 3*var). This worked fine. But now I wanted to create a third shape key. So after that I added ...
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1answer
219 views

What are the advantages of separating FK and deform bones in an IK/FK rig?

In an IK/FK rig is there any advantage to having a set of deform bones (DEF bones) that are separate from the FK bones? This is opposed to a setup where you have one set of bones you make FK ...
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131 views

Why is this driver expression not working?

as you can see here the strength of the light's property shoulds always be => 0 but the expression isn't working.
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1answer
233 views

How to have skeleton/armature change with shape keys?

I want to have it so when I change the value of a shapekey, it also moves a bone according to the value. So for example, when I change my character meshes eye width or height, the eye bones move with ...
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36 views

Question Using Drivers, Control the driver at specific frame to either turn off or minimize effect

I am using a driver in blender that controls a ShapeKey (ponytail moves up) I am assigning that driver to act on the spine bone in the head. so if the head looks up, the ponytail wont clip into the ...
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49 views

Scaling problems (using drivers or hooks)

I want to do a wooden construction within Blender 2.79. The width of the beams shall be variable (for example using a driver) but identical for all beams. My problem is that the position of the beams ...
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34 views

Entire blender is greyed out/highlighted.. or something

I haven't been in blender for over a month now and when I started it up fo the first time in a while, the whole thing is like white/grey: I get the feeling that it might be because my computer needs ...
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1answer
445 views

Problem with Material drivers for nodes properties

I'm following these instructions https://blender.stackexchange.com/a/75652 (paragraph "Setting drivers"), and also the video linked here https://blender.stackexchange.com/a/5384 video: https://vimeo....
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71 views

How to drive a value with linear fcurve on both positive and negative axis?

Like for example: I have a constraint on object A, B is driving the constraint influence. If I move B in +X axis 0 to 1, the influence on A is going 1 to 0 on a linear fcurve. I want to ...
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283 views

Materials Drivers not updating on viewport?

I want to do 2D eyes that the mapping is being controlled by a bone, for this I'm using a driver The problem is, the driver works but only on render view and not on material view As you can see the ...
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434 views

Issue with changing graphics card and nvopencl.dll. Blender immediately crashes

So I changed my graphics card from an NVidia graphics card (NVidia Geforce 430) to an AMD graphics card (ASUS STRIX R7 370). But now when I start Blender I get an error message that says: C:\...
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238 views

Driver transform channel for bone rotation

I am trying to calibrate a rig to make animation easier. I am using a driver on a calf bone with a transform channel variable to read the z rotation of a foot bone in transform space. For some reason, ...
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63 views

Shortcuts for pasting drivers

Recently I found out that I can introduce drivers in a very simplified method; copy a full path with Ctrl+Alt+Shift+C, and paste this to any Number buttons with an # inserted at the beginning. ...
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367 views

How do I add a conditional statment with a driver?

I want to add this expression in my driver panel but I dunno where to place a conditional equation. Emphasis on WHERE. When I place it different boxes I get an error. var=0 if var > 1 For now I'm ...
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260 views

Drivers do not appear in graph editor

I am attempting to create a driver to change the color of a material. However, after creating the material, I cannot find it in the graph editor. I have the object selected that has the material, and ...
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43 views

How can I eliminate the heavy lag

The lag is unbearable when I use blender, specifically when I move objects. I haven't even tried rendering. I just bought a refurbished Dell 780 Optiplex with Windows 7, 4GB RAM, and a Quad Core Q9300 ...
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280 views

How to add driver to an input of a node in the Animation Nodes?

Whenever i add a driver to an input of a node in animation nodes nothing appears in the Driver editor.
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2answers
1k views

How do I make bone drivers work?

I want to bend this character's arm bend, so I use some bones. But of course, there are always deformations. Well, apparently bone drivers are the answer. But when I go and look at tutorials on it ...
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82 views

DRIVER local position bug when rotating

I've made a driver that "animates" a bone by moving a controller on the local x-axis, but when I rotate the controller, Blender doesn't seem to take the fact that it rotated into consideration.Is ...
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24 views

How do I rig a tank track mesh? [duplicate]

youtube videos didn't help! I want the rig to have drivers for location.
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1answer
150 views

How to make a eyelid-system in BGE?

Knowing the limitation of the animation system in BGE, I would like to make a eyelid-system for a character. I made a system that works in Blender, but it has a constraint influence driven by a bone, ...
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147 views

Does anyone know a free render farm that allows drivers?

After I finally (thanks to Mr. Zak) got all my linked objects into a packed file, I discovered that I have been using drivers to pose the proxies of my charcters in the scene - sorry, I have been ...
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183 views

Custom Properties converted to integers and driver links lost after restart

I have made API defined custom RNA Properties in my Scene automatically added to a selected Object (not the Mesh). But when I save the scene and restart Blender, they are already visible but the ...
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444 views

How can I have drivers active in only certain frames?

Driver active for certain frames I have a character playing a saxophone. His fingers are driven by drivers which get they input from the keys of the saxophone. At the end of the music I would like ...

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