LDraw.org Discussion Forums

Full Version: LDraw snapshots coming up empty
You're currently viewing a stripped down version of our content. View the full version with proper formatting.
Pages: 1 2
I have recently installed the LDraw AIOI installer, and trying to get started with it. 

I have a model open in LDView, and it is looking good. I then try to use the snapshot function to get a png file render of the model, but the resulting file is coming up as empty/black.

I'm highly proficient with computers, but new to everything LDraw. I've tried to find a troubleshooting guide or a forum post of someone else experiencing this problem before, to fix the problem myself, but come up blank.

So I'm hoping can someone here help me out. Any suggestions what might be configured wrong, or I'm doing wrong, etc?
Hello there,

Some basic questions:

  1. What Operating System are you using?
  2. What version of LDview are you using? (You can find the version on the LDview menu > Help >About LDview)
  3. Have you tried any other model and does it behaves the same? (The LDraw-AIOI comes with a few models to try)
(2020-09-03, 16:36)Leonardo Gonzalez Wrote: [ -> ]Hello there,

Some basic questions:

  1. What Operating System are you using?
  2. What version of LDview are you using? (You can find the version on the LDview menu > Help >About LDview)
  3. Have you tried any other model and does it behaves the same? (The LDraw-AIOI comes with a few models to try)

Hi Leonardo,

Thanks for responding!

1. Windows 10 (Home, 64bit, Version 1909)
2. LDView 4.3 (x86) (27 Jan, 2018)
3. Yes, I've tried a number of models, and they all result the same, a 2-10kb black/empty png file. (I have tried 4349 - Bird, 4349 - Dragon Fly, 20015 - Alligator, and 10243 Parisian Restaurant)

I've attached an example black snapshot.

I did also receive one error message during the install of AIOI, I am not sure if it is related (as I'm not sure if LDView uses POV-Ray), but I have added it just in case.
So you can see the model and rotate it, but when it comes time to do the snapshot it doesn't show in the file.

What options are checked in the "save snapshot" dialog window? (where you enter the image name)
(2020-09-04, 0:11)Leonardo Gonzalez Wrote: [ -> ]So you can see the model and rotate it, but when it comes time to do the snapshot it doesn't show in the file.

What options are checked in the "save snapshot" dialog window? (where you enter the image name)

Yes, that's right, in the LDView window I can see and rotate the model.

At the moment in the Save Snapshot dialog I have none of the checkboxes selected.

I have tried with these turned on, in various combinations:
- Save snapshot series (file name then ends in 01)
- Don't use Pixel Buffer
- Transparent background
- Auto-crop
- Save image with specific size

The output file is always 100% black / transparent for any combination of these options I have tried.

I tried saving as a jpg once (still black), otherwise always saving as png.

I have not tried the checkbox 'All Steps'.
(2020-09-04, 0:19)Ber Wrote: [ -> ]The output file is always 100% black / transparent for any combination of these options I have tried.

This is probably an OpenGL issue, are you using the latest drivers (usually OpenGL 4.x).

You could try LDCad as it also uses OpenGL for the export to png.

Just load your model and press alt+e, and choose OpenGL view export. The png will be saved in the same folder as the loaded model.

If that one is also all black then this is most definitely a driver issue.
(2020-09-02, 5:22)Ber Wrote: [ -> ]I have recently installed the LDraw AIOI installer, and trying to get started with it. 

I have a model open in LDView, and it is looking good. I then try to use the snapshot function to get a png file render of the model, but the resulting file is coming up as empty/black.

I'm highly proficient with computers, but new to everything LDraw. I've tried to find a troubleshooting guide or a forum post of someone else experiencing this problem before, to fix the problem myself, but come up blank.

So I'm hoping can someone here help me out. Any suggestions what might be configured wrong, or I'm doing wrong, etc?

I can't think of anything that would cause that, but one thing you can try is to install LDView 4.4 Beta 1 and see if that fixes the problem. Also, I would suggest trying the 64-bit version of LDView 4.4 Beta 1 (LDView64-4400B1.exe). If that doesn't help, there is at least one more thing you can try, but it requires using the Registry Editor.
I am unable to replicate your error, so I have no solution to offer. Follow the advice of Roland and Travis. Otherwise, try to reinstall.
(2020-09-04, 18:49)Roland Melkert Wrote: [ -> ]This is probably an OpenGL issue, are you using the latest drivers (usually OpenGL 4.x).

You could try LDCad as it also uses OpenGL for the export to png.

Just load your model and press alt+e, and choose OpenGL view export. The png will be saved in the same folder as the loaded model.

If that one is also all black then this is most definitely a driver issue.

Hi Roland! Thank you for taking the time to help me with this!

I tried exporting to png from LDCad as you suggested, and it worked! I guess that rules out a driver issue.

But I saw the export to POVRay option too, so I gave that a go. I got the .pov file, then figured out my way around POVRay to generate a 1920x1080 0.3 AA file, which looks fantastic Smile

So LDraw still doesn't work, but maybe that doesn't matter with what you've helped me find in LDCad. Thank you again!
(2020-09-04, 19:09)Travis Cobbs Wrote: [ -> ]I can't think of anything that would cause that, but one thing you can try is to install LDView 4.4 Beta 1 and see if that fixes the problem. Also, I would suggest trying the 64-bit version of LDView 4.4 Beta 1 (LDView64-4400B1.exe). If that doesn't help, there is at least one more thing you can try, but it requires using the Registry Editor.

Hi Travis,

Thank you for dropping by to help me Smile 

I tried installing the 64bit beta version you suggested. Unfortunately, I still get solid black snapshot files.

As I mentioned in my reply to Roland, the export in LDCad worked fine, (apparently suggesting OpenGL drivers are okay), if that is helpful information for you.

I am interested in getting LDView working though, happy to work with your suggestions to figure it out, and give you back any information that is helpful for you in the development of it.

I'm a sometimes software developer myself, as well as working part time in a software support helpdesk, and highly proficient in editing the Windows Registry (and not breaking it...), so don't worry about getting too technical for me Smile
Pages: 1 2