Questions tagged [interpolation]

Interpolation is the process of estimating the value of a function based on known values. In 3D animation it is the method used for calculating the in-between positions when animating a character moving between two poses. Blender also uses interpolation for generating geometry and other purposes. Use this tag for questions related to any of the uses of Interpolation in Blender.

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Shading of imported STL

There is a new import option "STL" while the previous STL import has been renamed to "STL legacy". The new one is much faster, but it adds some inter-vertex shading interpolation ...
scriptfoo's user avatar
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How can transfer data from the point domain to the face corner domain

I could use some help with transfering data between domains. I want a value stored in the point domain and value coming from the edge domain interpolate to the face corner domain,so I can adjust the ...
M3D's user avatar
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Interpolate z-values of vertices using the surrounding area

I've got an .obj file with a raised street (selected in the image) and uneven terrain around it and want to flatten the street, so it kind of blends in with the surrounding area. What's important: ...
Neph's user avatar
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1 vote
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25 views

How to lower apparent resolution of image in composite nodes (with linear interpolation)

I need to reduce the horizontal resolution of an image in the composite node editor. Scaling down to 10% and then scaling up by 10x doesn't actually reduce the detail (resolution). Normally you would ...
Digit's user avatar
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Is it possible to animate multiple axis parameters as one spline?

I'm relatively new to animation and wonder if there is a way to animate multiple axes (position, rotation...) as a single animation curve. For example, I set two poses in frame 0 and frame 15, and I ...
PlanetControl's user avatar
1 vote
1 answer
120 views

Easing in animation graph editor not working at all

I try pressing ctrl + e on te graph but the easing type does not change at all. Screenshot shows how it looks like and what my graph editor looks like.
ZerotheHero.TakeaSip's user avatar
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Constant Interpolation in my animation not working

The pose of my rig is changing on non keyframed frames even though I have the interpolation mode set to constant interpolation, which should only effect keyframed frames. The issue seems to only be ...
impish.fbx's user avatar
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Hair curves flipped inside after a bit aditional sculpting

Hair curves flipped inside the normals surface. The UV unwrap does not help. What the reason it can be ? When I try to redone an interpolation modifier the result is same.
Pierre Rambal-Cochet's user avatar
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What is more expensive - having 1.0 filter_size and use_filter_size_min = False or 0.1 filter size and use_filter_size_min = True?

Working with blender 2.79. I'm trying to improve the quality of the jagged edges of the texture by having as few computation resources spent as possible (even 50ms difference is important). After ...
Anton Melnyk's user avatar
1 vote
0 answers
45 views

How to remove the interpolation between 2 frames for a specific object using the Python API?

I want to render the results of a molecular dynamics simulation in Blender using the Python API. I have managed to load the data and animate the molecules. Sometimes a molecule moves from one side of ...
user166920's user avatar
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Trouble blending Forward and Left Strafe animations in NLA Action Editor

I'm currently having an issue with blending animations using the NLA Action Editor in Blender. I have a character model with four strafe animations (Running Forward, Running Backward, Strafing Left, ...
Davie10863's user avatar
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1 answer
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Linear Interpolation Through Color Ramp Based on Angles

I'm coloring a sphere according to a color ramp where the angle from the south pole towards the north pole determines the color. I want a linear interpolation through these colors, but it seems like ...
Adam Swearingen's user avatar
1 vote
1 answer
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Animate object along animated curve synchronization issue

I'm trying to animate something like a 3D pen that leaves a trail of filament. The problem is that the trail and the pen-tip are not synchronized. I approach this by first animating a Bezier curve. In ...
Taher Anjary's user avatar
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72 views

How to keep linear interpolation setting without uv map bleeding?

So I have a texture atlas with a uv map for tiles in my landscape. I know you can set interpolation as closest to stop the bleeding, but I dont like the look of my textures with closest interpolation ...
oliver's user avatar
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1 answer
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How to set texture interpolation for Empty Images?

You can change the texture interpolation for images used as textures for objects in the Image node under the Shader Editor. Here you can change it to various interpolation method, in this example I'...
عبدالرحمن's user avatar
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269 views

interpolate geometry node shape keys

I am working with this great solution (at the end of the thread): (How to create Shape Keys in Geometry Nodes, including support for curve handles?) but cannot figure out a strategy to morph between 3 ...
Ge53's user avatar
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Script Grease Pencil Interpolation?

Trying to interpolate using bpy.ops.gpencil.interpolate() and bpy.ops.gpencil.interpolate_sequence() which need a context ...
ungivenNed's user avatar
1 vote
1 answer
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Interpolate Through Multiple Surfaces with Sverchok

Short Summary I am trying to interpolate through multiple surfaces, using the Sverchok addon. Essentially, I'm looking for a way to replicate the functionality of the Surface Lerp node, but for more ...
MarcusR's user avatar
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3 votes
1 answer
471 views

What Bézier animations can be safely exported to glTF?

Blender supports Bézier keyframe interpolation: glTF supports "Cubic Spline Interpolation". The documentation on this is insufficient for me to understand exactly what they mean. (Are the ...
Phrogz's user avatar
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1 answer
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Blender 3 stroke tweening?

I'm returning to Blender after its update from 2.9 to 3. I'm a 2D animator and was very impressed by Blender 2.9's interpolation mechanics - especially it being able to edit strokes down to the vertex ...
Steve's user avatar
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2 votes
0 answers
176 views

Is there a way to make blender use slerp interpolation when keyframing a rotation using quaternion?

I'm trying to get constant interpolation between keyframes when I rotate a bone or object using quaternion. I already tried linear interpolation mode, however it still does not automatically give ...
Edgar Vanegas's user avatar
1 vote
3 answers
400 views

Geometry Nodes Equation/Method for bouncing objects?

I would like to have a bunch of cubes bounce in a specific space. I have set up a simple equation of abs(cos(x))/x which terminates after 3 bounces. It looks kinda ...
TheJeran's user avatar
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1 vote
1 answer
171 views

Animation nodes vector animation interpolation

Im moving a large quantity of objects from point A - B by animating their vectors in a loop with animation nodes. I have everything setup how I want it to be. But instead of going from point A to B in ...
OptimusRhymes's user avatar
1 vote
0 answers
131 views

Where did Interpolation Modes go in Grease Pencil Blender 3.1?

Just upgraded to Blender 3.1 and cannot for the life of me find the different interpolation modes in Grease Pencil mode. There used to be an options menu with different interpolation modes (sinusoidal,...
BesselFunct's user avatar
8 votes
2 answers
1k views

Geometry nodes vector interpolation issue

I'm trying to translate the vertices of one object in the direction of the nearest vertices of a second object. I know this can be achieved by blending the two vectors using a mixRGB node like this: ...
hilifit's user avatar
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2 votes
1 answer
111 views

How do I move a camera using just part of an exponential interpolation curve?

I have a model of a room containing a 1/10th scale model, containing at 1/100th scale model, containing a 1/1000th scale model. I move the camera from a start position - looking in through the window ...
Stuart Leask's user avatar
7 votes
1 answer
805 views

Blender for scientific visualization - Point color interpolation from vertex color data based on distance

TL;DR: For a given point in a face/polygon how can I compute the distance between that point and all the vertices on the given face with shader nodes? Overall intent: I want to visualize complex ...
Rui Costa's user avatar
1 vote
5 answers
3k views

Getting "Cannot find valid keyframes to interpolate (Breakdowns keyframes are not allowed)" in 2D Blender

I'm trying to Interpolate two different keyframes of the same Grease Pencil shape. The second keyframe just rotates & moves the shape around. I keep getting "Cannot find valid keyframes to ...
Jose's user avatar
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0 votes
0 answers
30 views

VSE Transform Position attribute integer value workaround (2.93)

I just realized that in Blender 2.93 VSE strip transform position attribute is an integer value (pixel value as the picture shows below). Because of that animating the position results a stop/stepped ...
Prag's user avatar
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1 vote
1 answer
335 views

Custom animation interpolation without graph editor?

I did a bit of 2d animation and now I am working on 3d animations. In the past one was able to interpolate custom curves in 2d animation. As far as I know this is now gone, or at least I wasn't able ...
Racid's user avatar
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1 vote
0 answers
114 views

Different Interpolation Types for Different Bones

Im not sure if this question was asked before, but Is there a way to define the interpolation type for specific bones? For Example, i want to switch the expression of a character in a snappy way, but ...
Atti's user avatar
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1 vote
1 answer
269 views

Interpolate changing value with animation nodes

i would like to find a way to interpolate values that change each "random" frames. I can't use FCurve because i don't know the new values and they born from complex function f(obj.location) ...
Andrea Ciani's user avatar
0 votes
1 answer
119 views

Curved interpolated transition between surface and upright circle

I'm trying to make an object consisting of a curved flat shape transitioning to an upright circle. I already made some edges for the transition profile using curves. If I convert those curves to a ...
eineboek's user avatar
0 votes
1 answer
459 views

Constant Interpolation when Auto keying [duplicate]

I would like to animate using only constant interpolation. I know that I can change the interpolation with "T" or going to Timeline<Key<Interpolation, but every time I add a new ...
Zak Nelson's user avatar
0 votes
1 answer
360 views

Stroke order for interpolation?

New to blender, so advice is appreciated! I’m in a 2D project and working on a complex shape - namely a hand - and am trying to interpolate it into another pose. However, things turn out wonky during ...
Steve Hanley 's user avatar
1 vote
0 answers
550 views

How to stretch out animation time for a volume object

Blender volumes are great; particularly when I've got a scene (as I do right now) with a number of fluid effects going on. I can simply save them into a directory as a bunch of OpenVDB files and ...
Michael Macha's user avatar
1 vote
1 answer
157 views

Scipy Function as Node (sverchok addon)

I am trying to use the scipy.interpolate.interpn function within blender. I assumed the only way to do this is to utilize the sverchok addon, so my first attempt at using this function is with the ...
MarcusR's user avatar
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0 answers
212 views

Tweening drawings in Blender 2D object mode

So this seems like and obvious thing, but It's got me beat, and I've scoured the internet for threads about this problem and I haven't found them. I'm doing a rough frame-by-frame animation and so I ...
Ianiss's user avatar
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1 vote
0 answers
192 views

Any mesh smoothing algorithm that preserves vertex positions?

Is there a mesh smoothing algorithm that adds detail (like subdivision surface) but preserves (at least more-less) positions of original vertices (unlike subdivision surface)? Preferably one available ...
michalpe's user avatar
  • 135
2 votes
1 answer
605 views

Why do interpolated grease pencil strokes deform?

I have drawn a 2D Character using grease pencil and I’ve separated the limbs on different layers. When I interpolate the key frames, the strokes will scale or deform in strange ways. I’ve tried adding ...
MrJosh's user avatar
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6 votes
1 answer
1k views

Interpolate movement by incremental steps

I have a question for which I can't find an answer: I would like to move an object from one point to another along an axis, and I would like the movement to interpolate by increments (in my case the ...
MattOnyx's user avatar
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0 votes
1 answer
922 views

Blender Shader Node interpolation

I'm trying to color a cube with its own position in 3D space, which works well with the shader node setup I have, but only sets the colors for the vertices. However, I would like this to interpolate ...
i2n's user avatar
  • 55
2 votes
1 answer
2k views

Custom heatmap 3D texture

I have a 3D model constructed from photogrammetry. I would like to colorize this based on custom values on some vertices, and interpolate a heatmap for the rest of the mesh based on these values. I ...
JoshDragon's user avatar
1 vote
0 answers
84 views

diffuse map bake shows weird helper edge?

So I have an image texture. And I have a (mesh) plane. And I added a material, the above image texture. And I assigned the material to the plane. I made second uv map, and mapped the plane to the ...
Vincent's user avatar
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4 votes
2 answers
440 views

How to I change the Interpolation Type in the Map Range node like the documentation says?

According to the documentation, you should be able to change the Interpolation Type of a Map Range node. I am on 2.91.2 and don't see it. Is this a new feature that I don't yet have access to? ...
fmotion1's user avatar
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0 answers
101 views

Why doesn't blender grease pencil solid fill interpolate properly

I'm kinda noob when it comes to grease pencil in blender, I'm trying to render wavy blocks to maybe use as sprites in a game I'm creating, the strokes seem to get interpolated quite nicely but not ...
Adarsh Kumar's user avatar
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0 answers
52 views

Rotation problem when using bezier interpolation

I have built an helicopter and I rotated its propeller, when I used linear curve interpolation everything went fine. However, when I changed the interpolation to bezier it keeps rotating back and ...
Geraldo's user avatar
3 votes
1 answer
160 views

Limitation of a Rolling Shutter effect for propeller

I am trying to create artifacts of a spinning propeller using cycles from this post. I have the propeller animated using 2 keyframes starting at 0 degrees, and ending at 80000 degrees over few frames. ...
Jelly Love CZ's user avatar
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0 answers
613 views

Generate/Get all keyframes with python

I'm working on a project which requires me to export all keyframes for 1 object (the camera) in a "generated" state, meaning all the control points as well as all the keyframes generated by ...
PepegaClapWR's user avatar
6 votes
2 answers
380 views

How to smooth out different interpolation types

I am trying to complete a blender animation where a ball rolls down a slope under the influence of gravity. To simulate gravity I have calculated the time and distance the ball needs to travel to ...
Sid's user avatar
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