Retro PC Postprocess – for URP, HDRP and Built-in Pipelines
Retro PC-style post-process filter. Available in URP, HDRP, and Built-in pipelines. Lightweight performance, it runs smoothly even on mobile devices, rendering with palette and halftone patterns.
by Yuichi Higuchi
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Applying this filter produces a retro PC-style visual effect using a limited palette and halftone patterns.
It can also draw outlines on 3D objects, creating a classic CG-like atmosphere.
The appropriate palette is selected based on the framebuffer color before filter application. Intermediate colors are generated using halftone patterns from this palette and then rendered.
The setup method differs between URP, HDRP, and Legacy (Built-in) pipelines, but the same shader is used, achieving the same effect.
Customizable Postprocess Parameters
The following are parameters for RetroPCFeature, RetroPCPostprocess, and RetroPCPostprocessHDRP.
When using URP, use the parameters of RetroPCFeature, and for Legacy (Built-in), use those of RetroPCPostprocess.
For HDRP, use the parameters of the Volume Profile asset.
- Enable Postprocess
- Post-Processing Functions: ON/OFF
- Pixel Width
- Pixel width ratio
- (Set to less than 1 for vertically elongated dots)
- Pixel Height
- Pixel height ratio
- (Set to less than 1 for horizontally elongated dots)
- Output Height
- Vertical pixel resolution for screen output
- (Horizontal resolution is calculated based on screen aspect ratio and Pixel Width, Pixel Height)
- LUT Texture
- Assign the LUT texture output by PaletteCreator.
- Palette Texture
- Assign the palette texture output by PaletteCreator.
- Gamma
- Gamma correction value applied before converting the original screen color to a palette
- Brightness
- Luminance correction value applied before converting the original screen color to a palette
- Outline Mode
- Edge Detection Mode
- [None] = No outline
- [Depth] = Outline based on depth information
- [Depth and Normal] = Outline based on depth and normal information
- Outline Threshold
- Minimum value for edge detection
- (Increasing this value ignores minor depth differences)
- Outline Strength
- Amplification value for edge detection
- (Increasing this value slightly strengthens faint lines)
- Outline Color
- This color is processed via the palette before display, so it is not shown directly.
- Bloom Threshold
- Threshold for softening the outline of areas illuminated by bloom.
- Since high-brightness information is lost in the frame buffer, setting a value greater than 1 has almost no effect.
- It's best to set a value close to 1 and check if it looks good.
- If you don't want to thin the outline, setting it to 1.5 is recommended.
