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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Exporting MTL File from Blender to Render in OpenGL

I recently started using Blender to create 3D models for a game I'm programming with OpenGL and GLFW. However, I'm experiencing a lot of difficulties exporting and using Material Library Files (.mtl) ...
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20 views

Can't try Blender 2.8 due graphic card and/or driver

this post may seem repetitive but among many with this kind of issue none of them can help me. I already updated both drivers (Intel and Radeon) and BIOS, installed Radeon ProRender + libraries and ...
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blg module not being detected

i just started using bgl with blender scripting and it's giving this error "AttributeError: module 'bgl' has no attribute 'GL_MODELVIEW_MATRIX" i just checked on API documentation and it's supposed to ...
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Blender 2.8 refuses to launch with OpenGL error even though GPU driver supports 3.3 and is up to date

Blender refuses to launch and displays this error: I have a Geforce GTX 970 and the drivers are up to date. NVIDIA specs confirm that GTX 970 supports OpenGL 4.4 (https://www.geforce.com/hardware/...
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Can Opengl in Blender 2.79 render specular highlights?

I am working on a documentary and chose Blender as my motion graphic software, but just now I figured out that the final Opengl render is a bit different from what is shown in the viewport. The reason ...
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1answer
26 views

Blender failing to open saves using cycles render. (OpenGL 3.3 or higher error)

I have been trying to get back into blender but most of my saves aren't opening. I get the "Blender - unsupported Graphics card. the graphics card needs OpenGL 3.3..." If i save the file as Eevee they ...
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How can I draw multiple OpenGL primitives with the GPU module?

Is it possible to draw multiple types of Opengl draw methods inside the same shader batch? Based on the the GPU module documentation, please see the code below. For instance I have this line. <...
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1answer
35 views

How to highlight a polygon or a vertex under the pointer in Python?

I am trying to figure out how to highlight a polygon or a vertex that could be under the mouse pointer in Python for 2.80. The highlighting is just a visual indication. I realize that I will be ...
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23 views

Accessing OpenGL Render result pixels

I'm currently attempting to reach the pixel information of a Render Result. For performance reasons I do not want to save the file, only to render it, using Viewport Rendering. The Render Result image ...
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79 views

Blender won't open on windows 10 32 bit

this week I installed windows 10 32 bits on my old laptop because i was bored of linux but I could not install windows 10 64 bits for some reason. I installed blender but I got this message ...
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214 views

ERROR: A Graphics card and driver with support for OpenGL 3.3 or higher is required

I can't execute newest Blender 2.80, it says that I need a graphics card that supports openGL 3.3 or higher Processor Description AMD A6-3670 APU with Radeon(tm) HD Graphics, 2695MHz BIOS Version: ...
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170 views

Opengl 3.3 in blender 2.8

I have Intel i3 processor with Intel hd3000 graphics. Will blender 2.8 work ? Or I need to install opengl 3.3? Will that work on this graphic card?
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217 views

How to Save OpenGL Viewport Animation in Blender 2.8?

I am able to create the viewport animation, and then play it back from the render menu, but there doesn't appear to be any option to save it. When I render from the camera I have, it saves to the path ...
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“Light preview” window - Blender crashed [duplicate]

When the preview window (proprieties editor - light) of the light source settings is open and I change the settings of the light source, a system error crashes: "The NVIDIA OpenGL driver lost ...
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173 views

What happened to OpenGL render? Why has EEVEE been so slow at files?

I just spent days rendering something in 2.80, and it's got some problems, so I'll need to re-render. The thing is I don't even need anything but OpenGL rendering for this, but OpenGL along with the ...
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Blender 2.8 worked on windows 10 1803 but not in 1903?

I installed it about 5 months ago and it worked fine until i updated windows to 1903. there were already big changes in blender 2.8 so i redownloaded it but program said that my graphics card doesn't ...
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108 views

Blender 2.8 render farm commandline cycles without opengl 3.3

I used Blender 2.79 for some projects and rendered them on a cluster with 160 cores (Windows Server 2008 R2). No opengl 3.3 available works fine... Now I tried to upgrade to 2.8. I was able to get ...
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How do I find the final pose matrix for every bone to send to the shader?

Hello any advice would really be appreciated. I know there are lots of threads on this already but I have read many of them and I am still having trouble. I want to export a simple skeletal ...
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61 views

blf is a module or a parameter?

blf is a module or a parameter? I have read the documentation of blender, and I do not understand well what blf matters, or if it is only a parameter. I ...
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23 views

How do I make objects not renderable in OpenGL Render / overlays disabled on Blender 2.8?

I have some mesh that i do not want to be visible when disabling the overlays button but they still do so, in Blender 2.79 checking the Render only box was enough but here it doesnt work like that. ...
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Where are the settings to increase cycles threads?

I am trying to adapt the cycles render code to allow me to use the full threading power of my GPU (Radeon RX750 8Gb, 2048 OpenGL threads). There seems to be a limit from some time ago of 1024 threads, ...
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27 views

OpenGL texture painting

Does Blender 2.8 use OpenGL to store and project brush alphas like most modern software architectures do? Because I'm experiencing major brush stroke lag on low poly meshes with 4k textures.
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Blender not running with software opengl

I'm trying to run blender(2.80) from windows 2016 server with 2x nvidia tesla v100 and a matrox g200he3(?). When I try to run it(in RDP and VNC), I get the opengl version higher than 3.3 message. I ...
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748 views

Blender 2.8 How do i make objects with Render View disabled to not be visible on Viewport / OpenGL Rendering?

I have some objects which i do not want to be disible on the Viewport nor the OpenGL rendering previews, back in 2.79 it worked just fine by disabling render view on the outliner and enabling the '...
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What is the substitute for gpu.export_shader in Blender 2.80?

I am trying to export GLSL from Blender materials in a scene. This call appears to have been removed from module "gpu" in Blender's Python API as of 2.80. Is there any substitute? How should I proceed?...
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Can I access Blender's internal openGL state from bpy or bgl?

I am interested in building a custom scene exporter and for that it would be nice to be able to access Blender's openGL state directly. I'd like to, for instance, be able to access allocated VAOs, ...
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98 views

For Blender, which is the better language to learn - OpenGl or OSL? And why?

I have only yesterday started to learn OSL. Since OSL tutorials are scarce in Youtube, I am beginning to wonder if OSL is becoming obsolete as I get the impression that it is overshadowed by OpenGl. I ...
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2answers
83 views

Is there a fast way to render an obj+mtl file to PNG

I'm using command line blendering an obj+mtl file to PNG this question. However, it takes 2 seconds to render a scene. Is there a faster way to do so? Because, I need to render hundreds of output ...
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19 views

How to get and convert Blender 3d viewport to curve data [duplicate]

Searched a lot in python api of bgl and gpu modules. Is there a way to get curves (lines) separated by types of shading from camera projection of 3d Viewport gpengl? For example on image bleow ...
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49 views

Is it possible to run Blender 2.79 with this hardware and software configuration?

On my Mint 19, 32 bit, I've got this information: $ inxi -Gx shows the next lines... ...
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OpenGl Blender Python? Text based animation

I understand that blender uses opengl to render the 3d graphics. I need to try and achieve a 3d animation in the lightest way possible. Is there a way to get equivalent results as to what I've learnt ...
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2answers
6k views

Blender 2.8 Beta: OpenGL 3.3 Error?

Before I start, YES, I have done my own research - I know how annoying a repeat question is. Yet each answer is so specific to others... When I tried the beta 2.8 64 bit, it says "Blender requires a ...
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20 views

Why do I get a “Can’t detect 3D Hardware accelerated driver” error when opening Blender? [duplicate]

I downloaded Blender from the Windows App Store and I tried to open it. A message later appeared reading “Can’t detect 3D Hardware accelerated driver” It says I need OpenGL support 2.1 but I already ...
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1answer
405 views

How can i add texture with a realistic fabric look to my mesh?

I've created a mesh in blender and am trying to add a material in a way that will give the model a realistic fabric look. I added a material with an image texture, but the model looks very smooth and ...
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1answer
139 views

Blender 2.8 refuses to run on my PC

When I try to run Blender 2.8, I get the error "Device init failed: 0x80070490" My Windows 10 PC has the following graphics card: NVIDIA GeForce GTX 960 According to the geforce.com site, the ...
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69 views

bgl Hello Triangle Blank Screen

This code should draw the "Hello Triangle" (1) that everyone starts off with but it's not showing up. Since it's in Blender, I used (3) as a reference for when to draw. That's why the code itself ...
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16 views

OpenGLHighRise in Cycles is Black

I want to render a city with a world, but every time I render out an OpenGL High Rise City in Cycles Rendering, city is black. In Blender Render In Cycles Render How do I allow the OpenGL textures ...
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67 views

Blender won't start with OpenGL older than 3.3 [duplicate]

I have the beta version of blender 2.8, but I cannot seem to run it. When I run the blender.exe, it says opens CMD and says this: ...
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179 views

Blender 2.79b Crashes High Sierra MacBook

I'll try to make this as short as possible, but it's gonna be long. Problem: Blender 2.79b crashes my early 2011 MacBook 15-inch running High Sierra during viewport rendering. Operating theater: 2.2 ...
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18 views

Using opengl engine to animate a model, half of the model is distorted

I've been using opengl to create a programmable virtual environment for a university project. I need to load a model of a character and animate it. I found a model of a wolf on blendswap i like very ...
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Blender 2.79b on a iMac 27 late 2013 with NVIDIA Geforce GTX 780M

I downloaded Blender 2.79b and i am very excited about it. Until... i read about the rendering on a mac and that apple is not supporting Open GL anymore? This is the mac i have: iMac 27 late 2013 with ...
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97 views

displaying model in opengl

I am trying to depict the story of the thirsty crow using crow, pebbles and waterpitcher with different water levels in it. I have created a objects using blender. When i export these models and use ...
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331 views

blender 2.8 beta doesn't find opengl

Blender 2.8 doesn't load on my windows 7 notebook. It only says several times: "Warning! Ignoring untested OpenGL context profile mask bits. Warning! OpenGL core profile not available." I already ...
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1answer
255 views

Blender 2.8 slow render under mesa-18.3.2 and xvfb

How I can profile timings in Blender 2.8 Eevee engine rendering process? I have blender 2.8 (nightly build) running inside docker container, with mesa-18.3.2 (build from sources) and gallium driver ...
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46 views

How to make OpenGL render utilize maximum of CPU power?

I am rendering Scene strip from VSE in OpenGL mode and only 1 of 16 threads (AMD Ryzen 1700) is fully loaded, others are just around 5-10%. Overall CPU usage is ...
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386 views

Big problem when exporte normal map from Substance Painter to Blender

I need help. I have this problem when I export a normal map from Substance Painter to use in Blender. As you can see in the images it show some dark spots in the object, and it looks worse at ...
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311 views

Running Blender under Virtualbox

I setup a VirtualBox machine under Windows for dev related stuff (python, visual studio etc), everything works except that I cant run Blender :( it crashes with ...
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2answers
5k views

Blender 2.8 EEVEE render out viewport like old openGL render

In the older versions of blender 2.8 it used to be possible (I did it once and I saw videos of people doing it) to render out the viewport (I think it was with an OpenGL render option), in rendered ...
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168 views

blender 2.8 glRectf() not there

I'm trying to convert a 2.79 add-on to 2.80. I'm running into a problem with openGL function glRectf(). The code that's currently in the add-on draws the menu as follows ...
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1answer
738 views

Blender 2.80 not working on AMD Radeon HD 6470M GPU

I'm not able to open Blender 2.80, it tells me that it requires OpenGL 3.3 Core So i wanted to make sure that the problem is from my GPU and not from blender itself, so i wrote a simple OpenGL ...