Hi everyone!
I’m calling for a bit of help here. I am currently working on a Variable Font project, with many many paths. This is a pixel font and the variable is the shape of the pixel. I would also like to export 8 static fonts, one for each pixel shape. The style of the font is a bit complex in itself and I have +100 ‘complex’ ornaments and patterns. There are 463 glyphs in total.
Here is the 8 pixel shapes, each one in an ‘instance’ between the 1st and 8th pixel shape. To achieve the interpolation, I have many ‘hidden’ points in my pixel components, for the interpolation to go smoothly.

I achieved to export a VF from Glyphs. It weights very light compared to what I was thinking for these complexe outlines: 476Ko (and between 85Ko and 62Ko for the .woffs). I have a preview of the font in my finder for the .woffs but not for the .ttf.
The font displays well in FontGoggles and in Illustrator. The interpolation is working. But not well.
Here is my 1st issue. When I zoom on the font, all my outlines aren’t smooth, the pixels are ‘broken’ (even if they display well in Glyphs). It’s like at export the grid is changing and the outlines are sticking to a thicker grid…


My 2nd issue is that when I’m trying to test the VF in Dinamo’s Font Gauntlet or Wakamai, the font cannot display. Here is the error message I get:

It seems that it can read and recognise the font in itself, but cannot display the right outlines.
Is it possible that what I’m trying to achieve is impossible? Too heavy, too many outlines? Or am I missing something here?
Here are the issues for the VF.
Now, I have other issues exporting the Static Files. I read the article on Creating fonts with complex outlines.
As theses fonts will be static, I don’t need hidden points in my pixel components so I pathfinded them in order to simplify.

After many try and test, I manage to export my files: .ttf, disabled subroutines, no hinting, no remove overlap. And my pixel component is exportable, as someone give the advice in this topic (Export issue. How many nodes are too many nodes?).
I only have one master, and use the Rename Glyphs custom parameters in my instances to interchange the different pixels on export.
I just have an exporting issue with one complex ornament for 1 of my pixel shape, causing Glyphs to crash each time I try to export it (even alone), but at this point, I can live without it.
The issue I have here is that the pixels still have messed outlines, as in my VF export:

I have tried several parameters to prevent that:
- increasing the UPM
- increasing the UPM and scaling the font to the greater UPM
- setting grid spacing to 0 and subdivisions to 0
- decomposed all the glyphs to decompose all their pixels
I still have these broken outlines.
My version of Glyphs is 3.1 (3133) and I am working on a M1 Macbook Pro running on Monterey 12.2.1.
So if I summarise my questions:
1- Why isn’t my VF displaying in browsers?
2- Why are my pixels ‘broken’ in my VF and static fonts?
3- Is what I am trying to do even possible?
Thank you very much in advance for you help!