Issue with server side rendering

This topic has 6 replies, 3 voices, and was last updated 4 years, 3 months ago by Yorick.

Viewing 7 posts - 1 through 7 (of 7 total)

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2020-07-16 at 3:23 pm #30223

Yorick
Customer

Dear Verge,

We are running into problems implementing Server Side Rendering with Verge3D.
The model is running fine locally and in our application online.
But when running on our server (both private hosting and on Amazon EC2).
Some aspects of the model are not shown correctly.

You can see an example where it goes wrong here:
https://drive.google.com/file/d/1kfqS9FKZYj6vWeV6dioZKjSN8XkXLeAh/view?usp=sharing

This video is taken on an Amazon EC2 instance with GPU (https://aws.amazon.com/blogs/aws/now-available-ec2-instances-g4-with-nvidia-t4-tensor-core-gpus/).
The result of chrome://gpu is attached as a PDF. No clear errors in the console.
Version of verge: Verge3D 2.17.1 (WebGL 2.0)

Our 3D engineer will share the used files in a couple of hours.
Please advise on how we can get this working correctly.

2020-07-16 at 3:45 pm #30225

Alexander Kovelenov
Staff

Hi,
Have you considered a Z-fighting issue? Perhaps your surfaces are located too close to each other or you have a large camera distance range (try to increase camera near and/or decrease camera far distance).

Soft8Soft Tech Chief
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2020-07-16 at 5:09 pm #30232

dragosburian
Customer

Hello Alexander,
Here is the blend file used for exporting the scene Yorick presented, regarding Z fighting, I did try changing the camera range and even increasing the thickness of windows significantly(50 times) in order to eliminate that possibility. The issue persisted, I am also attaching another example of how the image gets warped, where not just faces close to each other fail to render properly. Please let me know if you need anything else, we are really looking forward to fixing this.
https://drive.google.com/file/d/1AfkcHHTFoXJ2CMlqo9R0PHnIesvbxGZS/view?usp=sharing
Dragos

2020-07-16 at 5:49 pm #30237

Alexander Kovelenov
Staff

Thanks for the file. I still believe it can be z-fighting issue. I’ve reproduced it on my computer with Nvidia GPU. Try to increase your camera near distance to 1 meter.

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Soft8Soft Tech Chief
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2020-07-17 at 5:55 am #30248

Yorick
Customer

Thanks for the hint Alexander, we’ll look into it.
But how come this happens on our servers and not locally? Should they not render the same?

Could it have something to do with Rasterization that is on that server “software only” in chrome?

2020-07-17 at 7:16 am #30253

Alexander Kovelenov
Staff

No, the most important line in your GPU report is “WebGL: Hardware accelerated”, while rasterization is used to draw various HTML elements on the page.

Most frequently, such difference occurs because various hardware has different depth buffer precision (the WebGL/OpenGL spec allows such situations).

Soft8Soft Tech Chief
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2020-07-22 at 4:30 pm #30478

Yorick
Customer

Thanks, great support Alexander!
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