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.
262
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2
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1
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Drawing a circle that faces towards the view with GPU/BGL?
Im trying to draw a circle using the GPU/BGL module that appears on a given certain 3D position (in my example, the cursor's location) and, when drawing, it points towards the current view.
I'm using:
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0
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31
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Blender not open in my laptop
Blender ver 3.6.2
After downloading and installing the software, it does not started because it show the popup window.
In this window it show the "the entry point not found ". Dll file like ...
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4
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3
answers
240
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How to draw a specific color with gpu shader
This is a bulid-in shader of gpu module to display a 2D rectangle in viewport,
if you check the color of the rectangle via photoshop/MSpaint or use ...
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0
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15
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Custom render pass
I'm looking to develop a post-render diagnostics overlay and am not quite sure how to go about it.
I can add an opengl overlay to the viewport fine with the SpaceView3D draw_handler_add, but this of ...
1
vote
1
answer
525
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Headless Blender on Cloud not using blend settings
Why does Blender headless not use blend settings? It works fine with X11 forwarding but just slow.
When using VM.Standard.E2.1.Micro (Oracle Cloud AMD64/...
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0
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149
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Custom render engine - creating material previews with OpenGL?
I'm working on a custom render engine through a Python addon that uses the bgl module for most of its rendering. bl_use_preview ...
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0
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390
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Render in Console
I'm in trouble
I render on a computing platform, where there is no graphical interface, and I have no permission to install software too.
I use the portable blender to render, and it can start ...
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0
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136
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Using OpenGL to apply filter to render
I am trying to take the image stored in viewer node then run a simple script in blender that applies a filter to the image via openGL.
The issue is I know next to nothing about shaders.
This is what I'...
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236
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My OpenGL Driver is 4.6 and Blender 3.4 will not run
I just built a new PC. I downloaded the most recent version of blender, and my opengl driver is at 4.6. However, when I start blender it says I need a 3.3 or higher to operate. I'm not sure how to ...
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1
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0
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547
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Blender 3.4 won't run citing unsupported graphics card but 3.3 works
I have 3 computers I primarily run Blender on, 2 of which are giving me this error:
...
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1
answer
236
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0
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0
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56
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How to directly store Blender File Images Externally?
I'm using this answer to generate images from view port
but is there a way to directly externally store/generate this image?
and by that I mean NOT having to manually save them through Image Editor
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2
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1
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416
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Drawing to multiple render targets using the GPU module
Is there a way to draw to multiple render targets at once using the Blender's GPU module? I am looking for something similar to glDrawBuffers in OpenGL.
Say, for example, my fragment shader looks like ...
- 115
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1
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164
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How to get started with the code for drawing Blender’s user interface?
I’m interested in working with the drawing code responsible for the user interface in the Dope Sheet & Graph Editors (not the Python code for menus/panels, but rather the actual timeline, ...
2
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0
answers
414
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Dashed Lines GLSL Even Sizing
I'm working on a dashed line shader in a Blender add-on and my aim is to get all lines, regardless of length, to have the same sized dashes and dash spacing.
GPU shaders are relatively new to me so I ...
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0
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1
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527
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How to get a list of faces with corresponding indices?
I am trying to get a list of faces that has each index of the 3 vertices that go with it. I thought about just doing it from scratch but they are kinda in random order.
I am looking for a list that's ...
0
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2
answers
215
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Changing lighting & color_type for OpenGL Render
When I render with bpy.ops.render.opengl, the shading appears to always be SOLID shading. If this is the case, how do I change the solid render's ...
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0
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440
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Blender 3.1 in a virtual machine with Ubuntu 20.04 doesn't start
When I try to run Blender it gives me this error:
...
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0
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138
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How can I make objects created with the GPU Module visible in the final render?
I used the code example for creating a triangle with custom shader from the official docs:
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1
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1
answer
474
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Is it possible to render in user perspective?
I notice that the user perspective and the camera perspective look different. (I have made sure that the camera view and the user view are from the same position and angle. Also, the camera is set to &...
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0
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Is there a way to render a scene to a video, much faster, using OpenGL instead of EEVEE, without blender unloading geometry?
It seems blender rendering is pretty slow because it doesn't try to do "real time" rendering, it aims at high CGI quality.
Is there a way to configure the renderer to sacrifice quality as ...
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197
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Blender not opening on old pc with Window 10 (64)
When I try to open the blender, it gives this warning:
However, in the scan I see that there is the latest version of open GL installed:
Will there be any way to fix the issue and get blender working?...
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511
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I'm having trouble with gizmo lines getting glicht: rotating, moving or scaling
System:
Windows 10 64 bit
CPU
I5-3470
GPU
GT 630
Processor and Graphics do not matter because the same thing happens on different Graphics and Processor
I found a fix but on ubunto I have windows
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1
answer
2k
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Experiencing Lag With Blender
Issue
I've experienced lag when viewing in the viewport window, selecting objects', and moving selected objects'.
Attempted Solutions:
Adding more computer RAM (previously 8gb, now 64gb)
...
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1
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0
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3k
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Blender Won't Open because it says I need OpenGL 3.3
I've recently wanted to get back into using blender for some fun art projects, but anytime I try and install the program and run it, I run into issues. The last time I used it was in December of 2020,...
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333
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Rendering opengl image and then saving to a filepath
Need help solving how to render an image and then save to a filepath while in a loop.
The following takes a photo and exports; however it isn't rendered.
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2
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1
answer
3k
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RTX 3090: Unsupported Graphics Card or Driver - OpenGL 3.3 or higher recquired
I have 2x RTX 3090 and the drivers up to date, running on windows 10, I also have the latest version of blender.
I get the following error when I try a render or try opening some menus in the ...
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1
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1
answer
299
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In Blender, how do I programmatically display a viewport rendering in a window just like if you pressed F12?
I know I can call bpy.ops.render.opengl() and that will create the render, but what I want to do is to create and then view the render, just like what happens when ...
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2
answers
1k
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How to make rounded corners for 2d rectangle with a custom shader?
Does anyone know how to make rounded corners for a 2d rectangle with a custom shader?
...
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1
answer
192
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OpenGL 3D ViewPort frame capture with transparency (no checkered pattern)
I attempt to use Blender 2.82 (currently I cannot change version), to render a robot hand holding an object, so that the hand creates an occlusion on the object, but the hand itself should not be ...
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1
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0
answers
477
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Drawing a rectangle using opengl in blender
I'm learning opengl in blender and successfully drew a triangle in 3d viewport.
Now I'm trying to draw a rectangle using Element Object.
Here is what I've tried. But it draws nothing.
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445
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Can shaders created in Blender Shader Editor be exported as OpenGL shaders in versions of Blender 2.9x?
I have created a shader in the Blender Shader Editor, since I find it very powerful and easy to use. I would like to export this shader so I can use it outside Blender. Is this possible for versions ...
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4
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2
answers
1k
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Fastest way copying from bgl.Buffer() to numpy array
I have some rendered or processed pixel data in a bgl.Buffer() object and need it in a numpy array but that proccess seems to take very long. Here is what I have tried so far:
...
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0
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112
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How can i use OpenGL/Viewport render in rendered mode on cycles?
Whenever I do it on Eevee, it works. and I find it to be a great way to render faster, but whenever I do it on Cycles, I just get nothing besides a grey screen, Help? My render settings are on the ...
8
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1
answer
696
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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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1
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87
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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1
vote
1
answer
620
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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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0
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354
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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0
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1
answer
65
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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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0
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605
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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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0
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1
answer
646
views
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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0
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1
answer
990
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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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0
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32
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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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21
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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??
user100591
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119
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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 ...
1
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0
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424
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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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0
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105
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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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0
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272
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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 ...
10
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2
answers
2k
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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0
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1k
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Blender won't start - GPUShader: compile error - AWS Elastic Graphics [closed]
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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