# Offset animated color change over many objects?

So I'm making an animation where I want about a dozen or so objects which all look the same to change their color, but with each object doing it at a different point, making a kind of swipe color change effect. But I don't want to make a bunch of different materials and animate each individual one. Help Please?

• Depending on your use case, you could probably use some kind of animated texture, or this addon blenderdiplom.com/en/tutorials/all-tutorials/… – gandalf3 Sep 30 '14 at 18:30
• ok so I'm watching that tutorial, and I ran this script that is run at 19:54 and this is the code I have so far: import bpy import math loops = 10 distanceX = 0.1 distanceY = 0 distanceZ = 0 rotationX = 0 rotationY = 0 rotationZ = 0 offset = 3 for i in range(loops): bpy.ops.object.duplicate_move(OBJECT_OT_duplicate = {"linked":False}) obj.location[0] += distanceX obj.location[1] += distanceY obj.location[2] += distanceZ obj.rotation_euler[0] += rotationX obj.rotation_euler[1] += rotationY obj.rotation_euler[2] += rotationZ – DragonHeart Sep 30 '14 at 19:24
• Sorry, ran out of characters. So I put that code in, but I get this error: line 17, in <module> NameError: name 'obj' is not defined. That line is this one: obj.location[0] += distanceX HELP! – DragonHeart Sep 30 '14 at 19:26
• consider obj = bpy.context.active_object on the line before the error.... this defines the name obj .... perhaps you missed copying a line. This is only to address your syntax error. – atomicbezierslinger Oct 1 '14 at 4:01
• oh ok. yah, it didn't have that line. now it works just fine. Thanks! – DragonHeart Oct 1 '14 at 16:32

(01) (Difficult the first time) A color texture influence driver can be used ... with a numeric [custom property] .. 24, 48, 72 and so on ... on the objects ... object data. This would not be a lengthy script. You must locate the target of the script in the outliner datablocks view with great care as depicted below. This requires effort because it is deep hierarchy . Most people I suspect have rarely used the datablocks view. The Blender UI debug info will not behave as desired. Object location x, y, z scripts have better debug info. If you attempt to write a texture driver from the properties window it will fail. Blender will not give warning. Note the driver is located on the Cube object not its material. Below I typed a distinctive numeric value of .678, not 0 or 1,into the field to help me locate it in the datablock view. Note the absence of the driver in the texture panel.

The final render will be correct. Code

frame > 20

(02) Special case .. if the objects are static and identical with simple color... you may be able to join them and UV Map them together. Use a single texture that is an [image sequence] to slide the color across them. Your image sequence may need to be structured as twelve logical strips or color.

(03) Materials and textures are not the same .. I would consider 12 textures ... perhaps copying colors ... and keyframe the color influence of the texture. I am assuming you will not have more than 12. (I am supposed to avoid asking for clarification according to the yellow box text). This would avoid a lengthy script.

(04) The more objects you have the more utility of the driver or script.

• Ok so I tried your animated texture method, and it worked just fine. thanks! I also want to try your first one, the pseudo code? where would I type that in? – DragonHeart Oct 1 '14 at 16:35
• RMB Right Mouse Button the property and select one of the following options. Add Drivers. ... Blender Link wiki.blender.org/index.php/Doc:2.6/Manual/Animation/Basics/… .. See a video site for newer Blender driver video. ... I suggest you first modify only something simple like the x position of object. (frame * .02) code. The material drivers are not working as expected at this time today. I may post a question here at this site. A new topic might be better. – atomicbezierslinger Oct 1 '14 at 17:07
• I am still investigating material driver updates. There are differences from simple position of an object. So (01) of the answer will be updated when I have a clear statement. – atomicbezierslinger Oct 1 '14 at 18:07
• @DragonHeart So above is the driver for a material texture color influence. That is not necessarily a recommendation to use it. – atomicbezierslinger Oct 1 '14 at 21:21
• Oh wow! thank you so much for your advice! It helps a TON! Thanks! – DragonHeart Oct 1 '14 at 23:21