Portable FotoSketcher full changelog

FotoSketcher 4.0 RC ships with a full set of 14 effects, spanning pencil sketches, drawing effects, painting styles and photo filters:
Pencil Sketch:
Pencil Sketch 1 - classic edge-based pencil sketch with adjustable contrast and color tint
Pencil Sketch 2 - stroke-based rendering with variable stroke size and density
Pencil Sketch 3 - dynamic pencil effect using iterative directional strokes
Pen & Ink / Drawing:
Black & White - dramatic high-contrast ink rendering with tonal simplification
Stippling - B&W stipple/dithering effect using the Atkinson algorithm
Felt-tip pen - mimics the look of bold marker strokes
Painting:
Watercolor - smooth, flowing watercolor effect built on spoke-based rendering
Oil Pastel - oil pastel brushwork using custom brush shapes
Watercolor splashes - loose, expressive watercolor with directional splashing strokes
Impasto brushstrokes - thick, textured paint with heavy impasto-style brushwork
Smooth painting - soft, blended painting style, well suited to portraits and landscapes
Stochastic Painting - a new effect with varied, randomised brushstrokes
Photo Filters:
Dream glow - the classic Orton soft-glow effect for a dreamy atmosphere
Adjustments - vibrance, sharpness and structure enhancement for your image

The "No effect" filter (which used to simply copy the left image to the right pane) can now be used for more than just adding a frame or texture. It can also modify the luminosity, contrast, color saturation, sharpness and color vividness of the source image.
Minor UI improvements
Correction of the brushstrokes frame preview not working
Bug fixes, including a couple that could crash FotoSketcher

Here are the new features in v3.30:
new draggable cursor to interrupt an effect at x% (useful for some effects where the result can be interesting before reaching 100%)
possibility to load your own brushes for Painting 10 (in transparent .png format) and render with twice larger brushstrokes
new abstract effect (great for desktop wallpapers or phone and tablet backgrounds)

This version has better Windows 10 support, improved memory management (Pencil Sketch 1 and Linear Halftoning), a new popup window previewing each effect and various bug corrections.

This version adds a popup preview window next to the drop down list of effects, improves Windows 10 compatibility and memory management and also solves a number of bugs.

I have also optimized Pencil Sketch 1, which can now process larger images than before without giving an out of memory error (I have successfully tested on a 7000x4000 pixels image).

I have also optimized Pencil Sketch 1, which can now process larger images than before without giving an out of memory error (I have successfully tested on a 7000x4000 pixels image).

I have tried to improve compatibility with Windows 10 and reduce occasional window flickering.
There is also a new preview window next to the drop down list of effects.
I have also vastly optimized Pencil Sketch 1, which can be up to 3 times faster than before and can run on larger images before giving an out of memory error (I have successfully tested on a 7000x4000 pixels image).

the DPI default value has been set to 300 for better printing quality.
although transparency in PNG images (alpha channel) is not supported by FotoSketcher, transparent pixels will no longer appear black. They will now be converted to white pixels.
the donation screen (coffee cup icon) has been simplified and will lead to a unified PayPal screen.
when using JPG images, the compression quality has been improved for fewer artifacts (save to PNG or BMP if you want maximum image quality).

Integration of the "invert colors" function in the script mode (F5)
New keyboard shortcuts (left, right and up keys) to move the divider between the left and right panes. Works when the main window is focused, even if an effect is running.