Unanswered Questions
2,513 questions with no upvoted or accepted answers
8
votes
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 ...
- 60.3k
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
6
votes
0
answers
4k
views
Convert Animation Nodes to Object and Keyframes
I have This Node Tree in Animation Nodes:
As you can see it creates objects and edit their location.
but When I render, even If I normally bake all the Dynamics, the cache disappears and then it ...
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
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0
answers
58
views
How exactly is orientation determined for hair particles rendered as objects?
I am using a Blender 2.8.x hair particle system to render particles using objects, but I cannot figure out precisely how the generated objects are oriented. At least not in all cases. If I do NOT ...
- 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
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
votes
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
0
answers
560
views
How to Offset a Particle cache in Time
This has been asked before - in 2013 - in relation to smoke:
How to offset multiple smoke instances by time?
The answer was inconclusive, so I'm wondering if there's something new since?
I'd like ...
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
votes
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
votes
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
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
votes
2
answers
549
views
Using Dynamic Paint To Spawn Particles Through Vertex Groups
What is causing the particle system to not follow the density group? Use modifier stack is enabled, both objects are well subdivided and the canvas object is an unmodified plane.
CommunityBot
- 1
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
votes
0
answers
264
views
Is there literally NO way to start a particle animation when the particle is emitted?
I've been battling the particle system for over a week now without any success.
A little context to what my issue is:
I'm using an instantiated collection(!) with 4 meshes in it as particles, each of ...
- 1,363
4
votes
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
0
answers
277
views
How To Model Ornamental Grass Procedurally
I am trying to model an ornamental grass procedurally (Miscanthus sinensis 'Gracillimus'). I want to be able to do this procedurally (not combing for example) because, unlike normal grass, it has a ...
- 12.4k
4
votes
0
answers
128
views
Project Idea/ seed bead particle array
I am new here and have been working with Blender for a few months for a college course. We often find solutions to problems doing internet searches because the course could not possibly have a ...
- 61
4
votes
0
answers
251
views
Is is possible to get boids data to animation nodes signalling when they are 'attacking'?
I am creating a space dogfighting scene and I have been able to hook up the particle boids to animation node instances, including positions and even the rotations by normalizing the velocity and ...
- 111
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
364
views
Level of Detail of Particles System?
First, the GIF above is a 60-frame sequence with a 1080x1920 size that uses a freestyle to render the outline.
This scene is a lot of polygon counts using the full shot model because the characters ...
- 2,246
4
votes
0
answers
505
views
Rotate object when colliding
I have a question regarding collisions in blender.
I'm trying to animate shortwave radiation (particle system) which reflects on different materials.
However when i apply a collision the 'solar ...
- 133
4
votes
0
answers
517
views
How to create very realistic rain with a particle system surrounded by a fluid domain?
I am working on a scene for a short film in which it is raining on a desert. One of the shots will be very close up so I want the most realistic look possible. I looked at other tutorials on how to ...
- 81
4
votes
0
answers
1k
views
How can I make particles not pass through the surface and not get "stuck" in it?
I want to make the falling autumn leaves.
I did a system of particles, but when the leaf particles reach the surface, (to which I applied collision modifier), they do not entirely remain on the ...
- 1,914
4
votes
0
answers
387
views
Particles intersecting object and then exploding without reason
I'm using PyroEvil's Molecular Physics addon, which is required for the simulation to work. Find it here.
I've been playing around with the aforementioned addon, to see what it can handle and what it ...
- 1,595
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
4
votes
1
answer
1k
views
How do I use dynamic paint to control hair density?
I tried using the dynamic paint modifier to control the hair density of an object but it didn't work out like I wanted it to.
First is set up a plane, gave it a few subdivisions and added a dynamic ...
CommunityBot
- 1
4
votes
0
answers
103
views
GameEngine: KX_BlenderMaterial vs KX_PolygonMaterial
I have a question about the material types in the game-engine.
e.g.:
2.66 Blender API - KX_PolyProxy(SCA_IObject)
2.66 Blender API - name ~ The material of the polygon.
When is the material a ...
CommunityBot
- 1
3
votes
0
answers
26
views
Cycles and OSL : how to implement a custom closure
I'd like to implement a custom shader in OSL (Open Shading Language) to reproduce the Hapke reflectance model (it allows to visualize the opposition surge effect, visible on the moon for example).
I ...
- 31
3
votes
0
answers
110
views
How can I optimize this Minecraft-style flood fill voxel lighting system I made in geometry nodes?
I made this flood fill/breadth-first search style voxel lighting system using geometry nodes. However, due to the wonky set-up I have in the repeat zone, it lags quite a lot when the light is moved. I ...
- 96
3
votes
0
answers
310
views
Experimenting with creating an opal-like material (UPDATE)
I've been wanting to create a material that attempts to mimic the look of a white opal gemstone. The biggest issue I am having is figuring out how to effectively create the streaky rainbow effect on ...
- 75
3
votes
0
answers
120
views
Complementary Colors using the Color wheel
In Photoshop, I can find the complementary color easily by adding 180 to the Hue (or subtracting 180, if the Hue is already over 180).
Since Blender maps the color Wheel from 0 to 1, shouldn't I ...
- 55
3
votes
0
answers
379
views
Why does bloom not work over a transparent background?
I'm using the Eevee engine and the fireworks are emissive particles, bloom is turned on.
I tried both eevee and cycles, I want to use eevee though.
I tried PNG with RGBA color, 8bit and 16bit color, ...
- 31
3
votes
0
answers
304
views
What happens to UV Tangents when using Custom Normals?
Tangent Normal mapping is done with the mesh Normals and UV Tangents. For it to work, these are supposed to be consistent with those used when baking, and orthogonal to each other. When you set Custom ...
- 6,647
3
votes
0
answers
1k
views
How to recreate PS1-style vertex lighting?
How would I recreate per-vertex lighting for a PS1-looking model? Vertex colours almost work, but they do not account for lighting. Is there a solution?
Example render:
- 25.9k
3
votes
1
answer
343
views
Geometry Node Attribute Unusable on Density (Shader Nodes)
I've found something weird. I have an Fac Attribute in my geometry nodes (it's a simple gradient). When I use it in Shader Nodes, it works, but not for the density value on volume absorbtion or volume ...
CommunityBot
- 1
3
votes
0
answers
422
views
how to reverse quick explode
How can I reverse the quick explode effect? meaning, after the object turns into particles how can I create an animation to reconstruct this particle system to its original object?
3
votes
0
answers
472
views
Dilate/Erode image in Shader Editor?
In the compositor you can dilate/erode an image based on pixel brightness, like this :
I'm wondering if there is a way to do the same in the Shader Editor (maybe with some clever vector math?).
I'm ...
- 2,530
3
votes
0
answers
273
views
Can this Houdini curl noise flow effect be done in Blender?
Can we make the particles flow across the surface of a sphere like this? Maybe using forces? I tried using a negative force field to attract the particles to the surface and tried using the vertex ...
- 78k
3
votes
0
answers
910
views
How to make an object cast shadows on other things but not itself? (Eevee)
I'm trying to make a low-poly model, and it looks very weird with casting shadows on itself. I'm trying to have it essentially only use vertex shading, not cast shadows, on itself. However, I still ...
3
votes
0
answers
262
views
Material Color from Rotation Angle
I basically have a two-part hinged lever. One arm is fixed, and the other arm can rotate in Y 0 to -45 degrees (X and Z are constrained to 0). So it's rigid body active -> hinge -> rigid body ...
- 149
3
votes
0
answers
217
views
Aperture Science portals using OSL
I am wanting to create Aperture Science style portals, And I’m aware of various compositing techniques to do this, but to make it more flexible I am thinking about using Open Shading Language. I do ...
- 12.7k
3
votes
0
answers
179
views
Procedural tile texture with different column width and tile lengths
I'm quite new to textures in Blender and still trying to understand how to create procedural textures using nodes. I'd like to create an approximation of these tiles. There are three column widths, a ...
- 31
3
votes
1
answer
74
views
Can someone explain why my Color Space options are different from any tutorial or documentation I've seen?
I'm wondering if anyone can explain what I'm seeing when I use the "Color Space" drop down on a Image_Texture node? No tutorial or documentation seems to have any info on this. I'm just ...
- 51
3
votes
0
answers
268
views
Recreating colored glass shader from VRay/Max to Blender/Cycles
Edit: Blend file:
I am converting a somewhat simple scene from 3DSMax/VRay to Blender/Cycles. I'm almost done with the conversion, but I am having trouble with matching the glass shader used in the ...
- 12.7k