Unanswered Questions
3,859 questions with no upvoted or accepted answers
8
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0
answers
303
views
how to write a custom projection type?
Is it possible to create a lens shader with EEVEE/Cycles ?
I'd like to have the control over the camera position and the ray direction per sample. This allows to simulate various conventional lens ...
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8
votes
0
answers
367
views
Blender on Windows is skipping python script. (brenda on windows)
We've been using Brenda for quite some time now for rendering architectural stills. Since our editing stations are doing nothing at night, I started making a desktop app that allows you to pick jobs ...
8
votes
0
answers
2k
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Antialiasing textures in cycles (Blender 2.77 and higher)
I would like to get an answer to a frustrating question.
https://wiki.blender.org/index.php/Dev:Ref/Release_Notes/2.77/Cycles
In this link is "Anti-Aliasing is now enabled for baking. (c359343)"
...
CommunityBot
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6
votes
0
answers
21k
views
cycles stuck at loading render kernels
ever sense I have been using the new LTS version or a newer version of blender its not loading the render kernels or sometimes it will but its just painfully slow even with the default cube scene has ...
6
votes
1
answer
4k
views
Separate alpha from color in Shader Editor
In the Shader Editor, I can create an RGB node and in there, I can set an alpha value as displayed in this screenshot:
However, no color separation node in blender supports extracting that value and ...
CommunityBot
- 1
5
votes
0
answers
154
views
Flat shading when using displacement or bump
When using a bump or displacement node and bump only or displacement and bump in the material settings, the shade smooth option seems to not be working. Instead the geometry starts to show, auto ...
- 51
5
votes
0
answers
322
views
Custom shader script in compositor (de-linearize depth buffer)
Some months ago I wrote a minimal opengl 2.5d game engine with pre-rendered backgrounds (such old Resident evil, Alone in the dark and Final fantasy games). Depth is managed through a grayscale image ...
- 3,072
5
votes
1
answer
909
views
get this gradient style in blender
I'm trying to get this gradient style:
My best result are with eevee with volumetric and gradient on a metaball, but i cannot figure out how to get the gradient fill the totally of the metaballs like ...
CommunityBot
- 1
5
votes
0
answers
578
views
Optical flow generated from cycles render is not proper
Scene generated from Blender, and flow is given. As it can be seen the flow generated is not proper, it is in a zig-zag format.
I see the scene at and above horizon have more zig-zag. Can someone ...
5
votes
0
answers
698
views
Control image texture source from outside node group
I'm working on turning a cavity node setup I found online into a node group I can append to my blender files.
The setup uses several mapping nodes (that I already converted to math nodes so the ...
5
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0
answers
152
views
is there any way to get to velocity of a fluid and use it in the cycle material editor
I'm trying to use flip fluids to make lava is there any way to use the motion blur vectors, or get the velocity to mix a material. or in the script editor is there anyway to drive that.
5
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0
answers
687
views
Particle Instance Modifier : colour each instance based on the emitter texture (like Hair strands materials do)
In cycles, with particle hair strands, I can get the colour from the texture of the emitter object for colouring the entire strand.
When I use the "Particle Instance" modifier on a mesh (a simple ...
- 395
5
votes
0
answers
2k
views
nVidia skin shader with the Principled BSDF
I've been using a skin shader primarily based on the Brecht skin shader, which is itself based on the Sum-of-Gaussians approach as seen in 14.4.7 from GPU Gems by nVidia. Its Cycles adaptation, which ...
- 51
5
votes
1
answer
505
views
Force Cycles GPU rendering for a Render Farm
So basically I'm on vacation for 2 weeks with a laptop without a CUDA device. I do have access to a render farm with GPU rendering support.
Now the problem is that I can't setup blender to render in ...
CommunityBot
- 1
4
votes
0
answers
29
views
translucent white resin with embeddings - material
I need to make a volumetric translucent material, possibly working in EEVEE.
It is a white semi-translucent resin with objects embedded.
The embedded objects are more visible near to the surface of ...
- 41
4
votes
0
answers
218
views
Migrating geometry shaders to Metal
I'm working on BlenderBIM (architecture addon for Blender) and we have a bunch of shaders to support plan annotations in viewports. Mainly it's simple shapes based of lines - lines, segment based ...
- 456
4
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0
answers
377
views
Drawing non-polyline smoothed lines with `gpu` module
Backstory:
Since bgl module will soon to be deprecated and it's doesn't work on Metal already I was trying to move code to gpu ...
- 869
4
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0
answers
192
views
Custom nodes, node limits, and compile times
I am working with some very complex custom toon shaders in Eevee. This causes several problems. First, the compile times are atrocious. Second, I am in danger of hitting the node limit if I also use ...
- 6,647
4
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0
answers
245
views
How to stabilize Random Per Island for Meta Objects
I have a very basic AN setup where I vector jiggle the position of meta ball instances for a lava-lamp-like motion.
I wanted to change the color as soon as an individual Meta Ball disconnects from ...
- 1
4
votes
0
answers
341
views
Understanding Blender's Invert Node and Varying Bit Depth Images
So, I am trying to wrap my head around exactly what the invert node is doing in the shader editor.
I realize that this sounds like the most simplistic question in the universe, but please bear with me....
- 1,433
4
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0
answers
568
views
Understanding Memory Usage Whilst Rendering in Cycles
I am trying to understand memory usage whilst rendering in Cycles with a view to making good upgrade option decisions.
I have a large scene which for my system is very heavy to render. I have 32 Gb of ...
- 567
4
votes
0
answers
134
views
Optix rendering appears to actually be doing CUDA instead of Optix
Optix rendering appears to actually be doing CUDA instead of Optix. I selected Optix, but it takes the same amount of time to render as when I select CUDA. I have updated my Nvidia driver to version ...
4
votes
0
answers
400
views
Is it possible to apply ocean modifier for only one face of geometry?
I was trying to recreate this illustration with my limited knowledge.
And while doing that I tried to follow some tutorials. In one of the tutorials, the animation done with ocean modifier and ...
- 13.7k
4
votes
0
answers
442
views
Shading according to velocity
I have a rigid body simulation of many objects and would like to change how they're shaded depending on velocity. It's easy to get location from object info node, but how about change in location ...
- 355
4
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0
answers
180
views
Possible to give a shadow a different material?
Hello.
Let say that in a this image, i'd like all shadows to be rendered as an red emissive material, is this possible in render ? procedurally, witouth any modifiers, just by the shader editor ?
- 1,942
4
votes
1
answer
774
views
Fluid simulation only shows the domain
I was making a fluid simulation, but when I try to bake it, it only bakes the domain. The fluid doesn't appear from the inflow. Do you know why? Thanks.
This is what appears when i render
CommunityBot
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4
votes
0
answers
439
views
Vertex colors with skin modifier
I have some curves that I want to render in Cycles; these are not blender curves, instead they are composed of a set of vertices, each having a color, and edges (but no faces).
Using the skin ...
- 141
4
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0
answers
692
views
Shrinkwrap an image to a cylindrical / slightly conical object with minimal distortion
I have some five gallon buckets of various different dimensions and artwork for a label that would go on them. I'm trying to figure out how I can show the label applied to a bucket accurately.
The ...
- 329
4
votes
1
answer
441
views
How to create a custom voronoi diagram with cycles nodes?
I've been looking for a way to create my own Voronoi diagram using cycles nodes, I've seen scripts that do just that but I wanted to create it using just math nodes within the Shader Editor, besides I ...
CommunityBot
- 1
4
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0
answers
865
views
How do you render lines in EEVEE/Cycles
I am trying to convert my workflow over to Cycles/EEVEE since the Blender Renderer will no longer be available. A fair bit of my product is drawing lines or paths in the scene (such as below which ...
- 1
4
votes
1
answer
382
views
OSL: How does Cycles implement derivatives?
The OSL language specification contains the following functions:
float Dx (float a), Dy (float a), Dz (float a) vector
Dx (point a), Dy (point a), Dz (point a) vector Dx (vector a), Dy (vector a),...
CommunityBot
- 1
4
votes
1
answer
2k
views
Hair partially disappearing in render after combing
I got a weird problem. Patches of hair on a rug for a bathroom scene are disappering in my render, but only if I entered particle edit Mode and combed the hair before.
So, I start out setting up my ...
CommunityBot
- 1
4
votes
0
answers
231
views
Strange light from glass
I'm doing a scene with a room with a table. On the table I have some wine glasses, but I get this strange light from some of them. The glass to the left looks OK, but the other are not OK. It seems ...
- 663
4
votes
0
answers
883
views
Simulate light bending due to gravity
I'm trying to demonstrate light bending due to gravity, but my knowledge of Blender isn't up to the job.
As a test I have a sphere with the Glassy BSDF shader. The colour is set to white, and I've ...
- 981
4
votes
0
answers
582
views
Using Particle systems on an Array Modifier's Cap
I'm new to Stack Exchange, but I've been using blender casually for the past year, or so
I'm currently working on a city, for the purpose of learning and fun.
To save myself from building a lot of ...
- 208
4
votes
0
answers
608
views
Nvidia GPU not showing as Compute Device for Cycles
I have a question concerning my GPU Cycles Compute Device.
I am running MacBook Pro 10.12.5 with a NVIDIA GeForce GT 650 M.
I have done my research a bit and stumbled upon a confusing area. I ...
CommunityBot
- 1
4
votes
0
answers
715
views
black displacement artifacts using micro-displacement and adaptive subdivision
I am currently using micro-displacement along side with adaptive subdivision.
However I have stumble upon a weird artifact.
As you can see there are some black pixelated artifacts along side the ...
- 1,216
4
votes
1
answer
451
views
Mesh emission strength to Area lamp strength
I've three emissive mesh planes in my scene which I'd like to convert to Area lamps.
I've set my new Area lamps to use precisely the same size, location and strength as the planes were. But when I ...
CommunityBot
- 1
4
votes
0
answers
2k
views
Render on Tesla K80
I'm trying to render on a Tesla K80, but it doesn't work.
blender --debug-cycles
outputs
...
- 53
4
votes
0
answers
1k
views
Can you link render settings across all scenes so they can all be changed at once?
I have multiple scenes to render and in my "master" scene I have set up the render nodes to output the render of all scenes. This way I only have to hit the Render Animation button once and all of the ...
- 852
4
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0
answers
947
views
How can I render a proper normal pass for smoke in cycles
I would like to render a normal pass for smoke in Cycles like this one:
I'm aware of this method mentioned in Blenderartists but the result is far from the result needed to relight in post (via ...
- 2,177
4
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0
answers
749
views
Copy node tree from one material to another in cycles using python
I have two cycles materials (say source and target). I want to copy the Shader Nodetree from the source material to the target material after clearing any currently present node tree(s) in the target ...
- 33.3k
4
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0
answers
2k
views
Synchronizing object in Cycles
I have a model of a butterfly that uses a displacement map for most of the detail on the mesh at render time. To get an accurate render, I have it subdividing 4 times for the render before applying ...
- 91
4
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0
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131
views
Is there a way to get the vector to the closest UV seam?
I am looking for a way to get the distance to the closest UV map seam in UV-space as a vector in the node editor. Like this:
The blue dot is the current point of reference, i.e. the point where the ...
- 25.2k
4
votes
0
answers
1k
views
Setup network render for cycles render on LAN
I am trying to setup network render with cycles as the rendering engine. My use involves rendering hundreds of images and I have already written logic for it in python which is working fine on single ...
- 151
4
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0
answers
871
views
How to implement a new BRDF in Cycles
I want to implement a new BRDF in Cycles.
I've already tried to code an OSL node but I couldn't because the way that BRDF closures are implemented in OSL seem to only permit BRDF closure composition.
...
- 158k
4
votes
0
answers
4k
views
Alpha transparency not showing in cycles viewport
Using cycles I have simple cut out people in the scene: planes with .png textures on them. The transparency shows in the material editor and is rendered correctly but is not displayed in the viewport. ...
- 187
4
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0
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748
views
How can I use a node-based texture for smoke flow in Cycles?
Preface:
I'm thinking that this might be a bug, because the behavior's pretty weird.
I'm posting it here in case it is the intended behavior and there's some trick I should use.
I can successfully ...
- 9,472
4
votes
0
answers
591
views
Why is this happening when I bake physics to keyframes?
So, I'm trying to do some stuff with physics and cell-fracture, and I need motion blur. When I bake the physics and render w/ motion blur, the objets aren't in the scene. So I tried baking the physics ...
4
votes
0
answers
4k
views
How to export smoothing groups made with Auto Smooth?
I know that there is an Edge Split modifier, but it actually splits geometry edges, which causes problems with further modeling. When I use "Shading: Smooth" and then enable Auto Smooth, it works nice,...
- 511