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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22 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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20 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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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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15 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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65 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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27 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
23 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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26 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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15 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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14 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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16 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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29 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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37 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
186 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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53 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
106 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
84 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
101 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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29 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
71 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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22 views

How does Blender render with flat shading without duplicating vertices [duplicate]

When applying a flat shading on a mesh in OpenGL effectively means that you need to duplicate certain vertices to split the normals. However in Blender the number of vertices in a mesh ...
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44 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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1answer
57 views

2.81 Render an armature like OpenGL in 2.79

Is it possible to render armature bones in 2.81, like it was in 2.79 with OpenGL?
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1answer
103 views

Integrated Graphics Requirments for Newer Laptops?

I'm buying a 10th Gen Intel Core, HP laptop. The specs say it only has an Intel Graphics Coprocessor. Will it run blender 2.8? https://www.amazon.com/2020-HP-Touchscreen-Premium-Laptop/dp/B081SM57RY/...
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1answer
35 views

Get Image Position in Image Editor for drawing lines with bgl

I am trying to draw some guide-lines on top of my image in my image-view using bgl. But when I draw the coordinates of my shape/line is relative to the screen/view when I actually want what I draw to ...
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62 views

Render order of triangles is wrong with custom draw handler

Example code from GPU Shader Module (gpu) "Mesh with Random Vertex Colors" renders faces in wrong/weird order, what might be the cause? ...
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0answers
77 views

Blender 2.81 OpenGL 3.3 Error

So recently I got a new computer since my old one was pretty bad and I needed an upgrade. This PC is incredibly fast and powerful but for some reason it's having trouble running Blender 2.81. I've ...
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19 views

Opengl script not rendering in 3D_View

On running Blender2.79- Bgl/Blf scripting template "Operator_modal_draw",nothing renders in VIEW_3D . context.area.type == 'VIEW_3D' There are no Errors nor any output on the Console.How to ...
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34 views

Opengl Gpu module import error's

In Blender2.79 (Windows10/64bit-Exe application) On running the sample Opengl/Gpu script - 3D Lines with Single Color on a Gpu which supports Opengl 3.1,Blender doesn't recognise the builtin Opengl ...
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274 views

Opengl 3.3 drivers blender 2.81

I use blender 2.81 at start, I get this error, the drivers are updated through the driver pack solution. Some may say that the graphics card is not suitable and needs to be updated. But if I use ...
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2answers
241 views

Blender 2.81 with Nvidia Quadro 2000m

I recently installed Blender - the latest update. Never before used this software. I have a relative old PC, HP 8560w with a quadro 2000m graphic card. My first problem was an error with "no open GL" ...
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1answer
218 views

How to make voronoi move like living ants?

In Twitter link below, I saw this work by Joe Gatling a few days ago. His voronoi moves like live bugs. How do you create that in Blender? Moving ants with voronoi. Edit. I'm back. I've just ...
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80 views

Why does Blender's front view point in the negative Y direction?

When switching to the Right view in Blender, the X axis points into the screen. When switching to the Top view the Z axis points into the screen. If we switch to the Front view, then the Y axis ...
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1answer
81 views

2D 'POST_VIEW' drawing with gpu.types.GPUShader(vertex_shader, fragment_shader)

I can use gpu.shader.from_builtin("2D_UNIFORM_COLOR") to draw a square to a view (the nodeview), and give it a single color, but I want to use a custom shader. Does ...
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1answer
36 views

Blender 2.8 render farm on DL380 Gen9 w/ Virtual Shared Graphics Acceleration

We're looking to upgrade our render farm from 2.79 to 2.80 using a Tesla M10, Quadro P6000, or Quadro RTX6000 and enabling Virtual Shared Graphics Acceleration on DL380 Gen9 – We're trying to meet the ...
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169 views

Opening blender,black tab,error message A graphics card an driver with support for OpenGL 3.3 or higher is required

I have downloaded Blender off Steam and when i try to open it, it it opens with the tabs I describe further down. I have updated my drivers via the control panel and my graphics card supports OpenGL 4....
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1answer
45 views

Blender 2.8 sometime I can not open my blender file by OpenGL 3.3 Error

Sometimes I can not open my blender file. I save the blender file and then I can not open it in next time. But I can open other blender file. graphic driver is latest ver Blender file is broken ? I ...
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104 views

Blender crashes randomly while using - OpenGL issue

I've been experiencing one particular problem for over two years without a solution. When using Blender (even just navigation in GUI), it randomly crashes. When I look to the Events Viewer, I get ...
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42 views

Rendering Grease Pencil objects on headless, no GPU render farm machines in Blender 2.8

Like many other posters, my company has been running into problems when trying to render Blender 2.8 scenes on headless, no GPU render machines. We are using AWS Thinkbox Deadline. We are able to get ...
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18 views

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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1answer
80 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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0answers
31 views

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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101 views

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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17 views

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
59 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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113 views

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
60 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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68 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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419 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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1answer
3k 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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