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PlayStation Texture (TIM)
The native texture format of the PS1.
The TIM format is the standard image file format for the Sony PlayStation (PSX/PS1) console. It stores textures, sprites, and background images in a way that maps directly to the console's VRAM (Video RAM).
A TIM file contains a header (identifying the bits-per-pixel: 4-bit, 8-bit, 16-bit, or 24-bit) followed by optional CLUT (Color LookUp Table) data and then the pixel data. 4-bit and 8-bit modes use palettes. It includes 'STP' bits (Special Transparency Processing) which handled the PS1's unique semi-transparency modes.
Released in 1994 with the PlayStation SDK. It was the format for Final Fantasy VII backgrounds, Metal Gear Solid textures, and thousands of other games.
PNG-64 (64-bit RGBA)
The ultimate format for transparency precision in VFX and compositing.
PNG-64 is the heavyweight champion of the PNG family. It combines the 16-bit per channel color depth of PNG-48 with a 16-bit alpha channel. This provides 65,536 levels of transparency, compared to just 256 levels in a standard PNG-32. This format is almost exclusively used in high-end visual effects (VFX), 3D rendering, and professional compositing. When you are rendering a CGI character to place into a movie scene, you need the edges to blend perfectly with the background, even after heavy color grading. PNG-64's 16-bit alpha channel ensures that semi-transparent pixels (like motion blur or hair) retain enough data to be manipulated without becoming jagged or discolored.
A PNG-64 file contains four channels: Red, Green, Blue, and Alpha. Each is 16 bits deep (16 x 4 = 64 bits). The 16-bit alpha channel is the defining feature. In an 8-bit alpha channel (PNG-32), a very faint shadow might only have 3 or 4 levels of transparency steps, leading to visible banding when contrast is increased. In a 16-bit alpha channel, that same faint shadow has hundreds of steps, ensuring it remains smooth under any processing.
Like PNG-48, PNG-64 has been part of the standard since the beginning but was largely ignored by the web community due to file size. It found its niche in the 3D and video production industries as a more accessible alternative to formats like EXR or TIFF for storing intermediate render passes.
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