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#1 2020-02-06 00:32:53

macdarren
Member
Registered: 2017-03-20
Posts: 411

Preview image bad

Is it known what causes the preview image to just be a black flat image instead of the actual model on the plate page?

All of my recent models seem to be previewed as these black images....even very simple ones like a rectangular shape with a small rectangular hole.

I do most of my modeling in OpenScad...but previously even very complex models generally previewed correctly, only a couple were bad once the preview feature was stabilized.

I can't say when this started but it has been present in all the latest releases and betas I have tried.



Thanks

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#2 2020-02-06 20:19:17

Shahin
Administrator
Registered: 2016-02-17
Posts: 3,536

Re: Preview image bad

When you encountered such cases, click on toggle and right click on the image and open it on a new tab. Try add random string at the end of url such as ?test
See if it does any help

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#3 2020-02-06 20:37:59

macdarren
Member
Registered: 2017-03-20
Posts: 411

Re: Preview image bad

when I open the image in a new tab or window I see basically the same black image....depending on which browser I use the way that single images is placed in the window is a bit different but always the same flat black...

Older images that display correctly in nanoDLP plate view also appear correctly on a new tab.

When I get info about the image I notice that older images that appear correctly are on the order of 2-3KB or more while a black image of near identical model is only about 800 bytes.

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#4 2020-02-10 04:40:27

Shahin
Administrator
Registered: 2016-02-17
Posts: 3,536

Re: Preview image bad

Darren, could you share a STL file + downloaded plate which contains such images?

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#5 2020-02-11 00:38:26

macdarren
Member
Registered: 2017-03-20
Posts: 411

Re: Preview image bad

Sent via direct email....

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#6 2020-02-27 08:01:10

Roberto Paoli
Member
Registered: 2020-02-15
Posts: 3

Re: Preview image bad

I have the same flat and black image problem but this only happens to me when I upload the file from USB from Nextion. When loading the STL file from a computer, the enter key does not work, nothing happens.
Uploading files via editor is all right.

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#7 2020-02-28 19:56:00

Shahin
Administrator
Registered: 2016-02-17
Posts: 3,536

Re: Preview image bad

Darren,

Yours also happen for HMI uploads only?

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#8 2020-02-28 23:17:05

macdarren
Member
Registered: 2017-03-20
Posts: 411

Re: Preview image bad

not sure what HMI is... However I upload STL files only via the web interface usually using FireFox browser.  I seldom use the 3d editor...I just upload properly supported and rotated models to a new plate.

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#9 2020-03-08 20:14:20

Shahin
Administrator
Registered: 2016-02-17
Posts: 3,536

Re: Preview image bad

Darren,

As a workaround latest build will render flat object in green, even though it does not have shade applied it looks much better. Hopefully it helps.

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