I made a topic like a question, because I don't really understand what and why.
Everywhere I read that transparancy doesn't work in EPS, when convert it from SVG in Inkscape. But sometimes it works. I tried to convert different SVGs with different levels of opacity, both with PostScript level 2 and 3. Totally I tried 7 images, and for five transparency works. I checked them In EPS Viewer and in AI.
Did something change in EPS? Or it's random, or it was optical illusion? I just want to be sure that other person get my EPS with everything is alright.
Thanks in advance

I'm not sure I've ever heard that EPS doesn't support transparency. It's a very common vector format, which I think is seen as a standard vector format. And as far as I know it does support transparency.

Although as I search, I see mixed results. My first 3 results say it does, the next few say not. 1 result explains the EPS can contain both raster and vector content, and when it contains raster content, the raster can't have transparency, but apparently the vector content can. That's from a Photoshop forum https://forums.adobe.com/thread/863253?start=0&tstart=0.

I can't say if that's true or not, though.

However, if you want to make sure what the other person receives, maybe you could send them a test file, just to be sure?

I'd like to try selling vectors in microstocks, I can't sent them test version
Oh, I see, transparancy can turn out to raster. MS require to make vectors without any raster effects. Thank you.

I know other people in this forum have sold EPS files that they made in Inkscape on microstocks. And I'm almost positive their images had transparnet backgrounds. So I think as long as you use only vector images, transparency should work ok.

Well, after you upload an image, do you lose control of it? If you uploaded a test file, couldn't you just delete it, if it's not working right?

PS does not support transparency.
The document needs to be flattened
https://helpx.adobe.com/illustrator/usi ... flattening

but then it would not be editable. illustrator solves this by storing his own data into the eps
https://helpx.adobe.com/illustrator/usi ... ansparency

so (I suppose) most popular vector app reverse engineered the illustrator data blob to be -somewhat- compatable.

I guess rasterizing occurs when flattening is not possible (transparent gradient). I don't know how illustrator deal with this if it doesn't rasterize. Maybe it just store the gradient shape (with 100% opacity) in PS and the opacity is stored in the illustrator magic blob.

If you want to share your works go with svg.
If you want to sell then pixmac seems to be less dumb than others and accept you to upload svg + jpg without the need for eps (don't have checked)
or don't use opacity
or dont use gradients
or pay a bounty for someone to reverse engineer the illustrator file format and fix the eps export function in illustrator accordingly