A small image file can still become a relatively large texture in memory. The file you save and the pixels a rendering system works with describe different things. Keeping both in view makes it easier to compare versions of a texture without guessing from the file size alone.
Start with the pixels
For a simple, uncompressed RGBA8 texture, each pixel has four channels with one byte per channel. The basic estimate is width × height × 4 bytes. A 1024 × 1024 image therefore needs 4 MiB for that one level under this assumption.
Reducing both dimensions by half reduces that base pixel count to one quarter. That arithmetic does not tell you how the image will look on your mesh, but it gives you a useful starting point for comparing options.
What the calculator measures
The widget adds four bytes for each pixel. With mipmaps enabled, it also adds progressively smaller levels down to 1 × 1. You can change either dimension and see the estimate update immediately.
It does not inspect your image or measure what IMVU, Second Life or Roblox allocates. Texture compression, pixel formats, mipmap behavior, platform processing and engine overhead can change the actual result. A PNG or JPEG file size is a separate measurement.
Compare a pair of exports
Keep your original source. Make a second export at a smaller size, then compare both on the same object and at the same viewing distance. Look especially at lettering, seams, transparent edges and high-contrast details.
Use the PoT Texture Resizer when you want to prepare another size locally. Review the dimensions you choose for the destination workflow; a single size cap is not a universal rule for every platform.
This article is also a working MDX example: its calculator is an imported React component with client:load. The article text is rendered by Astro, while the calculator becomes interactive in your browser.
← Back to all creator articles