Unanswered Questions
1,184 questions with no upvoted or accepted answers
8
votes
0
answers
299
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
5
votes
0
answers
148
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
320
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
906
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
696
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
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
4
votes
0
answers
28
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
217
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
371
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
336
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
0
answers
398
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 ...
- 13.6k
4
votes
0
answers
441
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
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
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,...
- 521
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
23
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
92
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
295
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
118
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
299
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
335
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
466
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
900
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
260
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
213
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
178
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
73
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
266
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
3
votes
1
answer
93
views
Using CFD temperature data to generate lighting
I have a VTK file that contains volumetric data on the temperature at different points on a flame. It has been obtained using a CFD simulation, with the file containing different values of temperature ...
- 13.2k
3
votes
0
answers
69
views
Is it possible to shade objects in Cycles based on Z gradient, to highlight/darken edges?
I'd like to shade the edges of my objects darker, like a toon shader, based on abrupt Z depth transitions to neighboring pixels -- in other words wherever the Z gradient is high, darken the image. I ...
- 545
3
votes
0
answers
71
views
Accessing the Render Engine Type as a String from a Driver Expression
I am trying to make a Render Engine switch for node-trees, that will give control over ignoring or using certain node-chains depending on what render engine is used.
This is basically an improvement ...
- 1,811
3
votes
0
answers
71
views
What happened to the color pallete?
Why don't I get the normal color pallette in my material? what happened? I've never seen this before.
My color palette is seemingly faulty. I am sure it is not, rather I am surely at fault, but I ...
- 60.3k
3
votes
0
answers
133
views
Displacement on Particle Location
I am trying to create a shader which uses displacement to create a dent in an object with a hair particle system, based on the locations of the hair particles.
The strawberry I have created is setup ...
- 31
3
votes
0
answers
1k
views
How to create a SOBEL shader?
I've been curious as to how recreate the sobel (edge detection) node from the compositor into the shader editor.
It seems the general method consists to create an highpass image and then use a mixmode ...
3
votes
0
answers
102
views
How to stack displacement nodes?
When using displacement modifiers, you can use the resulting mesh normals of the first displacement as the base for the second, such that the end result is a 3 dimensional displacement.
For example, ...
- 12.4k
3
votes
0
answers
66
views
Cycles - How to transfer information from a shader to another non-destructively ? (no baking)
How can we non-destructively (witouth baking anything into vertex color nor bitmap) transfer information from one shader to another within cycles ?
Here's an example :
Here is a simple proximity ...
- 1,942
3
votes
0
answers
705
views
How to export blender material as .material file and GLSL on Blender 2.8
I've seen alot of tutorials that explain how to save material and import it via append file but i wanted to export the material node as .material file and if possible, convert it into GLSL shader ...
- 31
3
votes
1
answer
1k
views
How to create a feathered border around an object?
This is the best way I could possibly phrase this question.
What I want to do is mix two different materials.
I want to use the secondary material to catch the rimlight of the object, but I only ...
CommunityBot
- 1
3
votes
0
answers
1k
views
How does a shader detect if two objects overlap
I saw this shader (https://www.youtube.com/watch?v=L2Du5F7PfQM - an animated procedural water toon shader) . It says (in it's blender market page - https://www.blendermarket.com/products/pure-toon-...
- 31.5k
3
votes
0
answers
563
views
Jagged edges using a toon shader and Evee
I am trying to create a cartoon style render using evee with light reflections on the material (wich is suposed to be metal). I tried everything like subdividing, auto smooth, changing shadow ...
3
votes
0
answers
465
views
How to convert a world generated Texture Coordinate into Object Texture Coordinate
In the material shader editor, one can use a Texture Coordinate from the Input, like generated, UV, object, etc.
For example the object texture coordinate,the main benefit is that it will allow you ...
- 441
3
votes
0
answers
110
views
texture mapping without texture being mirrored on other side of object
I have a cylinder I want to map a texture to.
To specify the location of the texture I use an empty.
In the material node editor I then use the object function of the texture coordinate node and ...
- 41
3
votes
0
answers
683
views
Procedural Materials On Fluid Simulations
Been struggling with this for a while. I've made a procedural lava shader and I want to put it on a fluid sim. The problem is, all the mapping methods I've tried make the fluid travel through noise ...
- 31
3
votes
0
answers
206
views
First attempts with SSS - where is the nose?
I am trying to make the skin for my female mesh and watched some tutorials on Skin Shaders. I tried to rebuild YanSculpts Tutorial https://www.youtube.com/watch?v=ktsyL2Kp5bQ&t=388s and the result ...
- 1,225
3
votes
0
answers
4k
views
Difference between a fac output and a Color output
What is the difference between fac output and Color output in BLender? My understanding about fac is, it is grayscale information(devoid of any color). In which case it confuses me when people take a ...
- 151
3
votes
0
answers
79
views
What is the significance of the value of the limit on the roughness attribute of the Oren Nayar shader?
In exploring the settings of the Oren Nayar shader in the Blender internal rendering engine, I find that there is an upper limit of 3.14 for roughness.
Is this the constant Pi?
Why is this the ...
- 5,446
3
votes
0
answers
249
views
Material Mode in Shading Panel
I have this version of Blender
What is the difference between the two Material modes in the Shading panel ?
On my PC GLSL seems to work, instead Multitexture seems doesn't work.
CommunityBot
- 1