The retro-look filters have been added.
I split this into three filters:
- Scanlines has a new option enableTint, which enables CRT pixel matrix simulation. It uses a column-aligned stripes pattern, which is generated in the shader based on pixel coordinates, so it is always pixel-perfect regardless of render target dimensions. The pixel matrix is independent of the darkening of alternating lines; try for example strength=0.2 and enableTint=True to obtain a 3x2 pattern similar to that of crt.png.
- New filter: Pixelization (in MiscFilters.py). This filter pixelates (subsamples) the image, producing a mosaic. This is placed in its own filter, because the pixelization requires a read into the color texture at a location other than the pixel being processed. (This implies that the filter must begin a new render pass, to ensure it has access to the latest pixel values. In the terminology of the framework, such a filter is “non-mergeable”.)
- New filter: Posterization (in MiscFilters.py). Quantization and gamma settings available as runtime parameters, just like in the original.
Also a small bugfix: the GammaAdjust filter was missing a default value for gamma in its initialization code.
Results shown here; code attached to separate post below.
The CRT pixel matrix simulation was surprisingly effective - it produces a screendoor-like effect, and characteristic color bleed in small details (see the thin parts of the wings for an example).
