Questions tagged [opengl]

Questions about OpenGL (Open Graphics Library) OpenGL is an API used to render real-time 2D and 3D graphics. Blender uses OpenGL for drawing the user interface, 3D view, and the game engine.

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Datastructures for 3d Retopology [closed]

I would like to create a C++ application with OpenGL (something like Topogun) in which I can do retopology. I am using Assimp to load meshes (this would be the highpoly mesh then). My question is, ...
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How to load image in GPU Shader Module and don't let user access them

I want to display the icons in 3Dviewport in my addon with this module, the problem is the user can access the icons in Image Editor. How to prevent user to access these icons in blender? ...
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15 views

Force view_draw call for custom Render Engine

I am creating a custom Render Engine which uses OpenGL. For this to work the engine needs an access to some OpenGL context. In blender version <2.9 there seems to be the only way to do so - when ...
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30 views

Blender Crashes on Startup in Windows 10, returns EXCEPTION_ACCESS_VIOLATION

Blender crashes upon launching the application in Windows 10, but not in Ubuntu Studio. It might have something to do with the graphics card, but AFAIK I've got the latest drivers. To note: Blender in ...
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1answer
127 views

Anti-Aliasing in GPU shader Module(OpenGL)

How to smooth the bound of the shape? If you run the following script in blender, you can see the Jagged Edge in that shape. ...
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7 views

Collada animation is is distorted

I have been successful with importing collada files that involve a model and armature to another project with blender. However when I try to add an animation, my model seems to be all distorted. For ...
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63 views

Graphics card driver with support for OpenGL 3.3 or higher ERROR

I am trying to access blender remotely via SSH using MobaXterm. I have installed blender on a Linux machine and am trying to access it from a windows machine. I have a NVIDIA Graphics card (GeForce ...
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30 views

why bgl meshes flip when nothing is selected?

As described in API the following script will create a mesh from active object using bgl module: ...
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1answer
54 views

Blender 2.9 Python GPU Module, drawing lines in the wrong position

I have problems with the GPU Module and rendering custom geometry in Blender. When I run the example code from the Blender docs, it works as expected. Running the first line drawing example produces ...
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35 views

Blender crash on startup on older Lenovo Thinkpad E520

I'm total Blender newbie, trying to get Blender 2.91.0 to run on my Lenovo Thinkpad E520 Edge (bought at the end of 2012). I just made clean install of Windows 10 (Home 64 bit) after replacing Lenovo'...
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43 views

capture data from different cameras

I need this for my video game that I want to start on in Blender Game Engine. I have not figured out how to use multiple cameras and make them give data out without them being active cams or without ...
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16 views

Unsupported Graphics Card or Driver when running on remote desktop [duplicate]

If I try to run Blender from remote desktop, it says looks somehow expected, but it is not. If I open Blender being on physical ...
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1answer
19 views

Getting wires displayed in OpenGL MeasureIt render

I'm trying to get a "CAD-like" 2D render of a model in Blender (2.79, sorry old OSX version so can't upgrade) using MeasureIt for dimensions. Some dimensions are to edges within faces. I've ...
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87 views

Using Blender's GUI application from WSL2 (repost from stackoverflow)

This is a repost from StackOverflow, I was recommend to post this here by a friend Recently a fellow intern finished his internship. For this internship, he wrote some automated fluid simulations in ...
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Face values in obj file is more than vertex count

When I exported the cone.obj from Blender. I got 33 vertices. But the face values specified in the .Obj files seem to included vertex till 65. How can i device what will be the vertex coordinates for ...
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1answer
645 views

Radeon RX 570 not rendering correctly using Eevee [Linux (Ubuntu), AMD]

Recently got my GPU setup, and after a bit of trial and error, I was able to get it to work with everything, until I decided just a bit ago to use EEVEE in blender instead of cycles; I was presented ...
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24 views

Will Blender 2.82 work properly on Macbook pro (Catalina) now?

I've come to a point in time where I have to upgrade my Macbook pro to Catalina for it to stop crashing. But I read online that Blender hasn't been working properly on the Catalina. Although many of ...
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26 views

Blender 2.8x do not work

I've searched for an answer to my problem and didn't find any. So, I'm gonna ask. My hardware requirement configuration is at it's minimum; at some aspects, over. So why I can't make Blender 2.8x work?...
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19 views

Blender did not run and shows some error [duplicate]

When I tried to run the blender it shows this I don't know how to solve this as I am new to coding. Anybody help me with that??
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30 views

Why do rendered images using a GPU have vertical lines in versions after 2.81?

While using GPU rendering I get vertical lines over the rendered object. Until version 2.81 I don't get this anomaly, I thought it would be some bug in version 2.83, but in version 2.90 presents this ...
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114 views

Converting bones transformation matrix from OpenGL to Blender

So, I'm trying to convert some transformation matrices from OpenGL to Blender but bone poses are wrong. I assume it's transformation matrix, I'm no expert in OpenGl but it's used in this function: <...
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108 views

Blender's GLSL texture rendering

I am trying to generate some texture using built-in Blender GLSL implementation using gpu and bgl modules. I have encountered a ...
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36 views

My blander worked normal on my pc today when i went to open it, was asking for opengl 3.3

my blander worked normal on my pc today when i went to open it, was asking for opengl 3.3 try reinstalling but it didn't work, i never needed to put anything for it to open, could this be some kind of ...
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47 views

blender opengl 3

Today i tried to download the latest version of blender but it gives me a problem on opengl, telling me that i need at least opengl 3.3, even though i should have opengl 4. So I found a modification ...
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27 views

How do I enable ambient occlusion for open gl viewport render?

It was possible to enable viewport ambient occlusion in blender 2.79. How do I enable ambient occlusion in blender 2.83?
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1answer
247 views

Copy framebuffer of 3D View into custom frame buffer

General question: Is there a reliable way to directly access the OpenGL framebuffer of a View3D for copying? (Please see the end of the post for more detailed questions) I need a very fast way to copy ...
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277 views

Blender won't start - GPUShader: compile error - AWS Elastic Graphics

I am looking to run a Blender workload in Amazon Web Services (AWS). I am testing on a Windows Server image on a non-GPU compute resource. Instead of GPU I am attaching AWS Elastic Graphics to the ...
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112 views

Blender doesn't start up

Good evening, I've been having an issue where the program itself won't start up after the initial command prompt window has disappeared. The program fully closes, it doesn't show that it's not ...
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1answer
301 views

Set the graphic card, before the first blender start. (Virtual Linux System)

The problem: Blender does not start and prints the following error message: ...
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73 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 ...
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1answer
115 views

How to run Blender on the discontinued Intel 4 Series Express Chipset Family?

is there any way to run Blender on the discontinued Intel 4 Series Express Chipset Family or will I have to fin
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0answers
20 views

quick preview animation with animated material?

I am looking for a poor man's render of an animation in order to evaluate blocking, timing, camera movements etc. without the "cost" of a full render. I found Is there a way to make a quick ...
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84 views

How do I recognize normal map type? whether it's +Y or -Y?

I downloaded some free models with textures as zip file. How do I know the normal maps used in it are directX type or opengl type? The models look very similar/slightly different when I flip the green ...
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193 views

Blender 2.83 OpenGL 3.3 Error

i'm trying to use Blender 2.83 in my laptop but i have the classic problem " a graphics card and driver with support for OpenGl 3.3 or higher" but i have a GT 540M that supposedly is OpenGL 4.6, i ...
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45 views

Why isn't ambient occlusion rendering on objects closer to the camera?

In Blender2.79, Opengl renderer, on trying to render an animation in the viewport with ambient occlusion enabled for quick "outlines", blender renders outlines on the monkey head (farther from camera) ...
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1answer
31 views

OpenGL freezes and turns off blender

I've encountered this behavior several times that blender put random black and white points on the blender window then a message box appears and says "Too many errors occurred. Application must close ...
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0answers
100 views

Fast streaming camera view to video for linux (v4l) system device

What i'm trying to achieve is to stream an arbitrary camera view in blender to a v4l device. What i've done so far After reading the community post about streaming the Eevee view on Windows and linux, ...
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48 views

Is there a way to render depth buffer into a texture with GPU/bgl python modules?

I need to render depth buffer of Blender's scene into a texture to further use it my shaders. I tried using the common OpenGL recipes for doing that, but none of them worked as it seems there is ...
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64 views

Rendering depth buffer to texture using BGL fails on FBO drawing

I am writing a custom render engine for a level editor addon with GPU / bgl modules. I need to render a depth buffer to texture to later use in my shaders. I tried the way it is usually done with ...
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0answers
57 views

Order of operations when calculating object transform matrix (matrix_world, viewport channels, OpenGL model matrix)

With its Python API, Blender allows us to directly assign the transforms of objects, using matrix_world attribute. Under the hood Blender renders objects via ...
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105 views

New GraphicCard - No compatible GPU found

I ought a new graphic card - (GTX 1660 Super) for my win7 PC. I Installed the newest driver, but blender 2.82 doesn´t allow me to use OpenGL. Only CUDA. I´m lost...
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62 views

I need a handler for render_complete but with OpenGL render

Is there a handler to execute a function after an OpenGL render (after the whole animation is rendered). Because this script ...
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1answer
461 views

Blender 2.8.2 Crashes on Startup (Windows10) - Not enough video memory?

Update: Also tried 2.78 - It seemingly gets little bit further but still hungs up before accessing the program. I just installed Blender 2.82a off the Windows64 installer on my brand new PC and it ...
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100 views

Joint GPU Shader Module and Viewport Rendering

Running one of the examples provided in the GPU Shader Module documentation works as expected. For example: ...
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2answers
351 views

Preview in viewport using OpenGL shader

I am trying to apply a custom shader (OpenGL, but if that's not possible I can learn OSL) to a STL. I will not use any lights, cameras, I'm not going to render it eventually. I would like to have the ...
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1answer
845 views

Higher Resolution Viewport Render

I'm trying to render a black/white wireframe image of my scene and have perfected how I'd like it to look in the shading viewport, but I can't figure out how to save out that viewport at high ...
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1answer
265 views

GeForce GTX 760: Unsupported Graphics Card or Driver

I recently installed Blender on my desktop to dip my feet into 3D modeling and printing. The computer has an AMD A10-5800K CPU with integrated graphics, which does not support OpenGL. I recieved the “...
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33 views

GTX+Radeon in Blender - It's possible? [duplicate]

I'm a long-time Blender user and my projects are becoming more and more complex and I was thinking in buying a new GPU. Now I'm using a GTX 970 V1 Windforce and a Intel Xeon X5660. A lot of people ...
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1answer
195 views

How to draw RGBA 2D image in 3d_view with gpu module (or without)?

I just copied and pasted from https://docs.blender.org/api/current/gpu.html#d-image: ...
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108 views

Why is UV mapped texture not visible on workbench in B.2.8?

I made a simple factory building with two materials. One material [factory_floor_material] is assigned to the floor of the factory. One material [factory_wall_material] is assigned to the walls of ...

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