Those pics look really nice. I have a spool of transparent PLA, but i would call it more “yellowish, slightly translucent” than transparent. These look so much better!
Pretty Impressive. I will tray that. My first attempt with a fiberlogy petg transparent look slike this. I hope it will be better when the top layers are printed. I have no idea why I get this blobs sticking out.
Did you dry the PETG before printing?
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yes. more or less. It was sealed in a vacuum box with multiple silica gel packs. But I will try and put it in the oven and then we see on monday
Don’t assume a filament is dry because it was factory sealed.
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While experimenting with printing “glass”, I read Rygar1432’s advise to print infill in a single direction. But I couldn’t comply using Bambu/Orca because Aligned Rectilinear would cross hatch.
Recently I realised that it actually only ever cross hatches when set to 100%. So here’s the trick: Set sparse infill to 99.99%. That will obviously round to 100% - but it will not cross hatch! I also set the angle to 0° but that is less important and would depend on the application.
Edit: Forgot to add that I have yet to compare side-by-side if this matters a lot or not. But Rygar lists it as top-three important.
Edit 2: Apparently when you use 99.9% or 99.99% it will only save as 99% so the decimals aren’t used. Hopefully it still wont introduce any change in density because we definitely don’t want that. Also, I now made side-by-side tests but couldn’t really spot a significant difference yet.
In the Wiki there is now a section on Printing tips for transparent PETG | Bambu Lab Wiki
I wondered why ironing didn’t make a difference. It turns out you can’t do the “0 top and bottom layers” thing if you want the ironing to happen: It’s silently ignored because ironing will happen at the top layer which is never printed when you rely on 100% [or 99%] infill only. So now reprinting with 1 top layer, aligned rectilinear.
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Hey, thanks for this thread! About to try some transparent PETG for the first time, and I appreciate being able to look at other people’s profiles in Makerworld - so helpful! 
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Here is my MakerWorld print profile for those who wish to just try out printing transparent filament.
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Test your filament and settings with my model.
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Nice! Downloaded your profile as well as the ExtremeElementz’ profiles. I wish more folks would do stuff like this. If I actually had boost tokens I’d give you each one, but apparently I don’t print enough files from strangers to earn them yet. 
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I create a collection of some of my calibration and testing models.
https://makerworld.com/en/@MalcTheOracle/collections/1184476
I will add more as I go.
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My workplace got a prototype 3D printed and we noticed that they must have printed a flat transparent part on one of the edges. We noticed an imperfection on one section of one of the edges that looked like they printed the part on its edge and broke off the part that was holding it steady. It probably gave them a much better starting point so they didn’t have to do too much post processing to get it clear.
I just saw the latest Orca update. One of the updates is useful for transparent materials.
Orca Slicer now allows user to set sparse and solid infill derictions independently. User can also disable solid infill direction rotation, which is particularily usefull when printing with transparent materials.
They also have a Precise Z height setting where they will adjust the height of the last few layers so the model height doesn’t have to be multiples of the layer height.
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I’m getting a lot of lines, not just on the bottom and top layers, it’s through the entire height. Using BambuLab’s basic transparent PETG. Any idea/tips?
A photo might help. Otherwise, it’s just a guess. But if you want to get results like this, it’s all in the threads linked above.
I’m not able to post media/photos (I think because I don’t have enough activity on this forum). I have followed all the above.
Just paste a picture in here. If it does not work, just read a few more threads.
Understanding Discourse Trust Levels
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Thanks for your help. Looks like I can now.