Batch converting hundreds of BMP images to game texture TGA format

The TGA format features support for transparency channels and high-quality lossless compression, making it irreplaceable in many fields. In game development, TGA is one of the standard formats for game textures. When adding transparency effects to characters or scenes, the BMP format, although a lossless image format, does not support transparency channels. Therefore, BMP textures must be converted to TGA—a common practice in game engines like Unity and Unreal. A similar situation arises in film post-production; for example, when processing image sequences with After Effects, the TGA format better preserves image quality and facilitates compositing of effects. In 3D design, the TGA format also perfectly renders materials requiring transparency channels, such as glass or water ripples, which the BMP format cannot achieve. The following introduces how to batch convert large numbers of BMP bitmaps to the TGA format at once, efficiently performing format conversion while also supporting various image formats like JPG, JPEG, PNG, TIF, and SVG.

1. Use Cases

When many character textures and environmental texture files in BMP format need to support alpha channels for use in game engines like Unity or Unreal Engine, we can batch convert them to TGA format to perfectly preserve transparency information and avoid the limitations of the BMP format.

2. Preview

Before processing:

After processing:

3. Steps

Open 【 HeSoft Doc Batch Tool 】, and select 【Image Tools】-【Convert Image to TGA】.

【Add Files】 allows you to manually select and add image files in BMP or other formats for conversion.

【Import Files from Folder】 imports all images from a selected folder.

The imported files are displayed below.

After processing is complete, click the save location to view the successfully converted TGA format images.