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.

0
votes
0answers
5 views

Are drivable outliner options not a thing anymore in 2.8?

Ive been working on a rig for the past weeks now and i just met with this drivers problem, i found out that in 2.8 you are not allowed to create drivers for enabling or disabling restrict selection ...
0
votes
0answers
6 views

Shape key drivers seem to break (red line under drivers) when i select my character mesh and enter edit mode

Just discovered the cause of this "issue" but I'm going to post anyway in case anyone else has run into it and also worried it had corrupted their files. My issue is: I'm in the Action Editor, and ...
0
votes
0answers
5 views

Error message while I trying to rename custom properties

Blender is giving me this error message while I try to rename custom properties.
0
votes
0answers
11 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 ...
0
votes
1answer
24 views

Boid Particles - How To Use Fighting/Battle Information In Animation (Fighting Ants)

I am experimenting with boid particles and I have set up an ant fight simulation, where there are two enemy boid systems emitted from different areas (vertex groups) of a plane. "Allow Land" is ...
1
vote
1answer
31 views

Blender 2.8 drivers, trigonometric functions not working?

I am trying to make an object rotate based on its position. Basically the Y-angle gamma = arcsin(var) where var is the driver variable connected to the x-location of the object. The only problem ...
0
votes
0answers
20 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 ...
0
votes
0answers
17 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 ...
0
votes
0answers
13 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 ...
0
votes
2answers
32 views

Adding a random offset to drivers

So I want to animate multiple "cables" (witch are curves), i want to animate the bevel start (or end) and add a random offset to this value. I could put some keyframes and offset them manually but i ...
2
votes
0answers
22 views

How do you make a seamless IK > FK > IK switch using drivers?

Is there a way to have a seamless IK, to FK, to IK, to FK, etc... kind of slider? I have seen it to be done in riggify but it uses a python script that only works with that armature and doesnt look ...
2
votes
1answer
119 views

Blender 2.8 Viewport object visibility problem

I have this annoying problem to which I can't seem to find a solution Is there a way to enable in viewport to display rendered only objects, check out image below to see what I mean. In 2.79 it was ...
2
votes
0answers
30 views

One shared material with different custom property for each object

I'm trying to procedurally generate a scene with several objects (cubes for now!) sharing a single material, but appearing and fading out at different times. So far, I have been able to place the ...
0
votes
0answers
19 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 ...
0
votes
1answer
31 views

Linearly Scale Light Temperature

I want to have a plane which goes from temperature x to temperature y with respect to one of its sides. I was looking into drivers but this doesn't seem to accommodate geometry, only scale and ...
0
votes
0answers
9 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 ...
0
votes
1answer
127 views

I can't seem to select any vertices edges or faces in edit mode, blender 2.8, Mac OS 10.12.5

I'm trying all three point/edge/face contexts and using the select tools, yet nothing is selecting. I can't do any modeling! I've read a few other posts pointing to graphics drivers, but I have the ...
1
vote
1answer
18 views

Custom float property used in a driver need manual UI modification to work

I'm currently creating some script to automate a cloth rig setup. In the process I'm adding a custom float property to an empty and use it in a driver. It's a concept I wish to reuse for other ...
0
votes
0answers
25 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 ...
0
votes
1answer
142 views

Blender 2.8 Beta (Linux Mint 19.1): No compatible GPUs found - Vega 64 Nitro+

I can't find any working information, how to fix this, and before I was trying to install some other drivers for my Vega, but i accidentally broke my previous installation.
0
votes
3answers
427 views

Blender 2.8 Beta: OpenGL 3.3 Error?

Before I start, YES, I have done my own research - I know how annoying a repeat question is. Yet each answer is so specific to others... When I tried the beta 2.8 64 bit, it says "Blender requires a ...
1
vote
0answers
72 views

Shape key and driver Problems Blender 2.8

I'm rigging a character and I would like to fix spots that weight painting won't fix with shape keys. But assigning bone as a driver doesn't do anything. It's controlled by an IK bone and doesn't seem ...
0
votes
0answers
27 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 ...
1
vote
0answers
9 views

Retrieving the Material from a NodeTree

For a driver scripted expression I want the name of the material for a node input value. It's an emission node and I want to make the following scripted expression for the emission strength: ...
1
vote
1answer
49 views

Is there a way to copy the drivers of the active object

Is there a way for selected objects to copy (or link) the drivers of the active object? with Ctrl+L we can copy many properties from active to selected, including object data, material, modifiers......
0
votes
0answers
10 views

Is possible to drive X uvwarp location with bone rotation?

I'm trying to do something similar to this video 2D Eyes Maya to UE4 In it, they show a rig that uses a bone rotation to drive the X- uv offset to change the eye texture in Maya, in Blender, that ...
1
vote
0answers
28 views

Blender 2.8 eevee - Is there a limit for image nodes quantity in a material?

I'm making a customizable character with switchable skin via driver. It is organized by 9 types of skin and each type with 3 make-up as you can see in the 1st image. A total of 27 images. So the ...
2
votes
1answer
21 views

View Expressions curve in Graph Editor

I've animated some channels, such as rotation channels and a modifier value using Expressions. But I can't find out how to view the resulting Driver curve in the Graph Editor. I'm using Blender 2.8. ...
0
votes
1answer
35 views

How can I animate the rotation quaternion of an object with just one driver?

Updated Question (driving orientation instead of location) I'd like to animate the orientation of an object using one single driver, but it seems that the UI only let's me animate each coordinate of ...
0
votes
2answers
27 views

One shape key, multiple bones driving it

I have a character that has 1 shape key that controls the shape of her thighs (both left and right). What I'd like to do is control this shape key with a driver when either the left or right foot is ...
0
votes
1answer
22 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 ...
0
votes
1answer
60 views

How can I limit frame count by counting a text list?

I have a list of names in a Text Block that are separated by line. There will be different amounts of names. I am using the list to generate titles but want to render one title per frame. I want to ...
0
votes
3answers
110 views

Linking value to another anywhere in blender 2.8

i want to link value from one value to another. sort of instancing but for values. for example in this case below: monkey red and monkey green have a mix color node that both drive them to white if ...
2
votes
0answers
72 views

Use self and the slow python expression

In putting together an answer to Changing Multiple Influences Simultaneously I came across the Slow python script warning in the drivers editor Using a set up as outlined here driving a pose bone's ...
2
votes
1answer
69 views

Problem with drivers value's statement

i set up cube rotation and movement by object near by cube,but i also want to set up its z location so it cannot penetrate through plane every time it move forward and backward,there is some problem ...
1
vote
1answer
49 views

Offset on driver via scripted expression

I am trying to rotate a set of limbs on a centipede all slightly offset from each other in a 360 degree cycle. Each one will have a driver with an offset, thus the centipede would walk as seen here ...
0
votes
1answer
42 views

Problem to update fcurve driver

My problem is get the "angle" for updating the expression inside , in this example the expression is a simple string for explain , but i want controll expression by floatprop(that is not a problem) ...
3
votes
0answers
18 views

When a Driver is being evaluated are the final positions of objects finished evaluating?

When a Driver is being evaluated are the final positions of objects finished evaluating? Does the Dependency Graph take into account references made in a Driver for a topological sort? The Blender ...
1
vote
1answer
48 views

Add Min and Max Values to Driver Expression?

I have a driver using a scripted expression: var*2. It's working great but the values it's outputting range from .005 up to about 1.5. I'd like to limit the range of the output to something like a ...
2
votes
0answers
97 views

How to make abs() give correct result for negative numbers?

I am trying to use the simple absolute function abs() in Expression frame for a driver, but it won't work. I've tried to put it in long sentences, or even just typing abs(-1) but the negative still ...
1
vote
1answer
115 views

Baking camera property drivers to keyframe

I know its possible to bake the values of drivers to keyframes using Object > Animation > Bake Action but is there a way to bake a driver that is controlling ...
3
votes
1answer
58 views

Empty controlled light grid

I'm still not an animator in any way but I have to find a way to animate something... In a way resembling to what is achieved in this video, I have to create a grid of light bulbs which intensity and ...
3
votes
2answers
153 views

Change a Driver based on which Scene is being Rendered

I am looking to drive a property in a material node based on the current Scene when rendering. The purpose would be to mix between two different parts of the node tree so that one Scene renders one ...
0
votes
0answers
20 views

Visual keying on bone driving shape key issue

I'm rigging in blender a character with clothes that can be put off ( ex : the character undresses in one animation) To do this, bones that affect the pullover's mesh are constraint ( child of ) by ...
0
votes
0answers
23 views

Make Drivers Control Textures?

I'm working on a model right now with an image sequence. I only want the texture on my character to animate when a particular bone is being animated. When it's resting I want the texture to rest. I ...
0
votes
0answers
19 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 ...
0
votes
1answer
138 views

Material driver works, but doesn't update in viewport [duplicate]

I'm on Blender 2.79. When using drivers on node properties the material doesn't update on the Rendered/Material viewports until I force reload it. My drivers are pulling custom object properties from ...
0
votes
1answer
65 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 ...
2
votes
1answer
53 views

How to write drivers to be copied and pasted between objects' modifiers?

I have assigned a script-expression driver to a field in a modifier. The expression is a function of properties of the object to which the modifier is assigned, extracted as Single Property variables. ...
0
votes
1answer
16 views

Is there a way to restrict the operation of a driver or even record the action of the driver in Blender

I have a small animation playing and I have made use of some trajectory equations in order to obtain a more realistic jump in the form of a driver, but I also want to add some additional movements to ...