I gave the beta a try and it seems pretty nifty! Great job!

Since I'm an programmer who's an aspiring artist, I have a few questions:

1. Is there a way to turn off additive brush-layering (ie the opacity does not change when you stroke over the same place)[1]? I am used to Krita and Photoshop having an option to toggle this. The only way when the opacity increases is when the pressure increases.

2. Is there a way to create custom brushes? I'd love to be able to create my own. Also, Krita has some nice ways of "scripting" brushes which was nifty. The current ones are more than fine, but I usually make certain "helper" brushes to speed things up a little.

3. Do you plan to open-source certain parts of Leonardo? It'd be great if you open-sourced the specification for .leo and, the brush format, so it's easier to create conversion tools. I'm not a marketing expert, but I imagine having the ability to import brushes from Photoshop would be a huge benefit.

4. Do you intend to support plugins?

--- [1]: http://i.imgur.com/lqa6E9r.gif

P.S: Sorry for dumping ideas like this.

1. Yes, we have one parameter we call "flow" that does what your GIF shows. We also have a parameter called "opacity" that does what you want to do. To create a brush that behaves the way you want do the following: open brush settings panel (located on the upper right of the screen), go to the "flow" tab, change "flow pressure" to 100%, go to the opacity tab and change "opacity pressure" to 0%.

(we need to improve the brush settings)

2. Yes, use the same brush settings as described above. You can click on "tip" (round circle for standard brush) to change brush tip.

3. We might open source the brush format in the future.

4. Maybe in a distant future. The problem with plugins is that you have one more API to keep backward compatible.

Thanks for testing Leonardo! Please feel free to email me if you have any more questions or feedback: henning.tegen 'at' getleonardo.com

Nice. I'm wondering, does "zero lag" mean that the painting is handled in a background thread, while keeping the UI responsive.

Or does it mean something else?

Yes and progressively updating the resolution.

The "Ghost Point" and "Isometric" strokes look very useful. While with practice I think I'll develop a steady hand with my Wacom, those features look really helpful when precision is needed.

FYI, you can also add those features (lazy mouse, curved lines, isometric and perspective constraints) to any art app (including Photoshop) with the Lazy Nezumi Pro app. http://lazynezumi.com

I was pretty impressed with the demo. Great work.

Thanks

Cool. Did you implement the versioning yourself or do you use git or something like that underneath?

We implemented it our self. We tried a bunch of existing solutions like SQLite but they were all too slow handling large amount of pixels.