61 questions
0
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100
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Bump map failing to cause changes in surface of sphere in Unity
I've been having some trouble with randomly perturbing the surface of a sphere with a bump map in Unity (v2021.3.18f1) for a VR application.
Here are the steps I've taken so far:
created a sphere ...
- 229
1
vote
1
answer
2k
views
How to prevent Color Banding with GIMP?
Just doing a simple bump_map operation in python GIMP. But the result has color banding!
import os, glob, sys, time
from gimpfu import *
image = pdb.gimp_file_load(img_path, img_path, run_mode=...
- 1,191
2
votes
0
answers
849
views
How to create bump map using as little RAM as possible?
I am working with Python and NumPy. I have an image:
Its heightmap:
I want to combine them to create a bump map like:
I need to use as little RAM as possible. The formula is:
newColor = oldColor+(...
- 109
1
vote
0
answers
450
views
Calculating tangents on a normalized cube
I made a post similar to this one previously, but I have gained a lot more insight since then. For context, I am creating a DX11 based 3D rendering engine where the central focus is a large planet, ...
3
votes
1
answer
2k
views
OpenGL Normal Mapping
I'm trying to implement Normal Mapping, using a simple cube that i created. I followed this tutorial https://learnopengl.com/Advanced-Lighting/Normal-Mapping but i can't really get how normal mapping ...
- 55
0
votes
0
answers
235
views
Grid artifacts when disabling linear filtering on bump map in Three.js
If the magFilter of a bump map in Three.js is set to THREE.NearestFilter, a weird grid artifact appears on the object. The grid's spacing is equivalent to the bump map pixels. As soon as the magFilter ...
- 45
1
vote
0
answers
388
views
Tangent and Bitangent are not orthogonal to normal
I am trying to calculate the Tangent and Bitangent vectors for my terrain. I followed this tutorial to figure out how to calculate these 2 vectors and from what I understand, Tangent Bitangent and ...
- 1,065
2
votes
1
answer
1k
views
blender2.8 gltf export for three.js with bumpmap or normalmap or roughnessmap?
I saw some discussions saying gltf does not export bumpmap but if I look into my exported gltf file (separate files mode) there is a bumpmap file with a bumpscale (and also normal map). After loading ...
- 137
0
votes
1
answer
490
views
How to detect bump mapping with OpenCV
I have an image with bump mapping, like the image here (the rightmost one):
I wonder if I can detect the bump mapping area with OpenCV. The image is a normal RGB image with no depth information. Any ...
- 11
0
votes
1
answer
958
views
2D Water Bump Mapping - Monogame
Thanks for taking the time to check out my issue.
I am working on improving the ocean in my first attempt at a game. I have decided on a using a bump map against my ocean tiles to add a little ...
- 641
0
votes
0
answers
460
views
OpenGL: Which shaders for normal map (bump map)?
I could not find a way to generate a normal/bump map in PyOpenGL. Specifically I want a map which I can read with glReadPixels(). I do not know how to get a map of the form: (width, height, normals) ...
- 1
1
vote
1
answer
163
views
How do you bump-map large areas in a JavaFX Canvas
I want to apply some lighting effects using JavaFX onto a canvas GraphicsContext. At first I used the Lighting.bumpInput to pass a static bump-map for lighting. However this only lights a certain area ...
- 286
3
votes
1
answer
3k
views
Bump Mapping with javascript and glsl
/**
* A class creating buffers for a textured box to render it with WebGL
*/
class RasterTextureBox {
/**
* Creates all WebGL buffers for the ...
- 51
0
votes
1
answer
297
views
rough bump texture when loading OBJ in three.js
We are having difficulties loading model in three.js
we are using OBJLoader2 because it smooths mesh properly, but somehow textures are looking way more rough then they should be.
some normal map ...
0
votes
1
answer
481
views
Bump Depth slider for Maya Python script
I have asked about this Python script before, but now i have become faced with a new question: I want to have the texture slider of my script affect the bump depth of my model, but I am not sure how ...
- 23
0
votes
0
answers
2k
views
What's wrong with my Normal mapping? C++ Directx
Hi guys' I'm trying to implement Normal Mapping in Directx and I'm very close to creating it but I'm getting these weird black colors on some objects. This is how it looks like without the Normal ...
- 41
0
votes
0
answers
87
views
scene loaded via objectloader, bump map not rendering
attempting to apply a bump map to an object loaded, but no change is seen on the material
var loader = new THREE.ObjectLoader();
loader.load("../js/brain2.json", function(object) {
var mapHeight =...
- 45
0
votes
1
answer
2k
views
Three js bump mapping
I have created a simple scene in three js (r85). It contains a camera, a light and a plane geometry mesh. I have also created a renderertarget where I render the bumpmap texture of the plane with a ...
0
votes
1
answer
2k
views
Improve bump map quality in threejs
I have a model with a flat surface where I'm applying a bump map texture to draw and put some text on it. The code I'm using is this:
loadedMesh.material.bumpMap = new THREE.Texture(canvas);
...
- 6,200
1
vote
0
answers
215
views
Add generic Bump Map in Fragment Shader
I have a obj with normals and I want to use a surface bump map on it.
Can anyone help me how can I calculate the final normal map from the obj normals and the Bump map
my fragment shader is:
...
- 99
4
votes
1
answer
7k
views
Displacement map in three.js
I'm currently using a black and white image as a bump map for my model. The model is an .obj file with the associated .mtl file for UV mapping. This is the code I use:
// Load material ...
- 6,200
1
vote
1
answer
2k
views
Three.js bump map not updating
I have a .obj model with the corresponding .mtl file loaded in my scene. I'm applying a bumpMap to it after being loaded:
var mtlLoader = new THREE.MTLLoader();
mtlLoader.setPath('/...
- 6,200
0
votes
0
answers
90
views
GLSL Bump Mapping Point Light
Recognize any logic errors? Any suggestions to improve this code or to enhance the results?
Image: Before & After
Video: Short video demonstrating current bump mapping results!
The normal and ...
3
votes
1
answer
1k
views
GLSL3 Tangent space coordinates and normal mapping
First of all, I must apologize for posting yet another question on this subject (there are a lot already!). I did search for other related questions and answers, but unfortunately none of them showed ...
- 183
1
vote
1
answer
4k
views
Bump map give no effect on texture in three.js
I am using THREE.ImageUtils to load maps and bumpmaps.The grayscale image of the maps are used as bumpmaps .on adding bump maps it doesnt gives any effect on it.
var material = new THREE....
- 1,337
0
votes
0
answers
992
views
Changing settings of normal map intensity
i currently have an issue with the correct view of my Normal map in three.js.
It looks like shown in the attachment. I think it is a problem with the setting of the normal-map intensity. Is there a ...
- 11
1
vote
1
answer
2k
views
Getting the Tangent for a Object Space to Texture Space
A university assignment requires me to use the Vertex Coordinates I have to calculate the Normals and the Tangent from the Normal values so that I can create a Object Space to Texture Space Matrix.
I ...
0
votes
1
answer
163
views
Bump Mapping black fragments
Currently i try to implement Bump Mapping for my OpenGL Project.
The Problem is that same parts of my cube is black. Like shown in this picture :
I am almost certain that i just dont understand how ...
- 1,272
-3
votes
1
answer
5k
views
Bump-map a sphere with a texture map
We would like to bump-map a sphere with a texture map. However, the surface
of the sphere has an area that is 10 times the area of the texture map(area for both in pixels). Describe different ways in ...
- 871
0
votes
1
answer
340
views
Three.js ColladaLoader bumpScale/weighting? Way to adjust bump map intensity
In the current ColladaLoader.js I don't see anything that reads or applies the Collada standard's "weighting" value (0.0-1.0) that indicates bump intensity or "bumpScale" in Three.js Phong material. ...
- 1,190
6
votes
0
answers
666
views
SKSpriteNode lighting doesn't work with textures from SKTextureAtlas
I ran into a problem with SpriteKit (tried Xcode 7 beta and Xcode 6.4 on OS X 10.11 beta) where normal-mapped lighting breaks down if I create a SKTextureAtlas from the image and normal files that ...
- 64.5k
1
vote
1
answer
1k
views
Trying to generate 3D bumpmap text in PHP
I have a website I monetize with numerous original pictures on it, I want people to visit the website to see the original pictures and have search engines only show the pictures with transparent ...
- 2,092
0
votes
2
answers
1k
views
How do I create an Object-Space normal map from a height map?
I'm able to convert my existing height-map into a normal map by sampling the surrounding pixels, like in this question Generating a normal map from a height map? except I'm doing it on CPU.
I have a ...
- 2,189
18
votes
3
answers
4k
views
What's wrong with my normal mapping? I think it's my tangents
edit: you might want to start at "Edit 3" because I've solved a lot of this
Here's a screenshot of my normal cubemap applied to an icosphere:
The tangents for my cubemapped icosphere are generated ...
- 2,189
4
votes
1
answer
4k
views
Normal mapping: TBN matrix different result in vertex shader compared to fragment shader
I'm working on a normal mapping implementation for a tutorial and for teaching purposes I'd like to pass a TBN matrix to the fragment shader (from the vertex shader) so I can transform normal vectors ...
- 1,824
1
vote
1
answer
643
views
SVG filter bump mapping with diffuse lighting spills out
I am trying to create a bump mapping effect in SVG using luminanceToAlpha conversion of an image and then altering the location of a point light on the overall surface.
Here is the short fiddle I ...
- 35
4
votes
2
answers
7k
views
Normal mapping on flat water surface produces incorrect specular highlights
I have a flat water surface with a dudv and a normal map attached to it. The dudv map works correct and the normal map is attached correct as well (visualizing the normal map looks like it should).
...
- 221
1
vote
1
answer
156
views
"virtual" movement normal map without camera move and without move light source in Three.js
How can i move normal map without moving the camera and without moving light source in Three.js?
i have a plane that is perpendicular to the vector of the camera view.
This plane is always in the ...
- 21
0
votes
0
answers
423
views
What is the difference between a World Space Normal VS a Tangent Space Normal?
Figured I'd ask to get a great detailed explanation on what is the difference between a tangent space vs world space normal.
Also please include any pros and cons to either or if possible.
mainly ...
- 553
8
votes
3
answers
13k
views
Unity3D, round the edges of a box, cube?
What's the usual way to round the edges on a cube, a rectangular object as in the examples?
The ideal result would look pretty much exactly like these images.
(Naturally, you could literally use ...
- 12.5k
0
votes
0
answers
537
views
Is there a "standard" extension to the .mtl format which allows specular, normal or parallel maps?
Reading about the MTL material format commonly used with the Wavefront OBJ format, I discovered that it doesn't support additional features like specular mapping, parallel mapping, bump mapping, etc.
...
- 8,383
1
vote
1
answer
275
views
Normal Mapping Questions
I'm implementing tangent space normal mapping in my OpenGL app, and I have a few questions.
1) I know that, naturally, the TBN matrix is not always orthogonal because the texture co-ordinates might ...
- 1,275
3
votes
1
answer
2k
views
libgdx and pre-built shaders?
I am coming from an XNA background and it was really cool to re-use shaders that other people made. There was a really cool bloom shader that was available and easy to reuse. Is there an official or ...
- 10.3k
1
vote
2
answers
1k
views
SDL OpenGL Normal mapping
What is the simplest way of applying a normal map to a textured four vertex polygon in SDL? Do you have to create a shader or is there a simpler way? I have here my code that creates a textured ...
- 127
0
votes
1
answer
2k
views
Tangent Space, Tangent / Binormal Calculation
I have the following code to calculate the tangents , bitangents. And I can successfully render some mesh examples using normal mapping.
I have an issue with a particular mesh, that it calculates the ...
0
votes
1
answer
496
views
Vertex world position in glsl, JOGL
so i've been trying to implement bump mapping for some time and i have it working in some way. So it renders the texture and shadowing correct but does not change as the light source moves around I ...
- 105
0
votes
1
answer
811
views
Bump mapping with GLSL
I'm trying to implement bump mapping but I don't know where is the problem, the shaders seems to be ok. I'm pretty sure the normals, tangents and bitangets are well computed and the problem is in the ...
- 21
2
votes
0
answers
2k
views
ThreeJS: Does bumpMap for Phong Material uses UV Mapping?
I got crazy trying bumpMap working on a PhongMaterial in ThreeJS (r61). The diffuse and normal are working fine. Here is my code:
var params = {
map: new THREE.ImageUtils.loadTexture("models/...
1
vote
1
answer
2k
views
Bump Mapping in OpenGL and GLSL
I'm trying to implement bump mapping on a cube using OpenGL and GLSL. However, when I rotate my cube around, only the left-facing square and right-facing square appear (that is, in the negative x and ...
- 1,743
0
votes
1
answer
1k
views
How to perturbate surface normal from height map
I'm working on a bumpmapping implementation in my own 3D tracer. And to be really short - I want this result:
I've been reading pages and pages about bumpmapping, heightmaps, normal maps, ... and I ...
- 123