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Does BMP support alpha channels?
PNG, BMP and PSD file format actually support alpha channel. Alpha channels are usually used with 16.8M color RGB images. The resulting image is called RGBA (RGB+A, A means alpha channel).
Which format does not support an alpha channel BMP?
PNG format
PNG format supports RGB, Indexed Color, Grayscale, and Bitmap mode images without alpha channels.
What is an alpha channel for a bitmap?
Instead of making a color transparent, each pixel stores information on how opaque it is. This opacity data is called alpha channel and is typically stored after the color channels of the pixel.
Is the BMP file format support transparency and alpha channel?
The codec for the BMP file format (Real name: DIB “Device Independent Bitmap”) does support transparency and alpha channel since Windows 95 And since then that codec was always part of the OS. So, why when we save BMP, are we losing the alpha channel ??
Is there a 32 bit image with alpha channel?
32-bit images with 8-bit alpha will work out of the box, at least on XP and newer. You need a BMP file in 32-bit alpha BMP format, which many applications cannot save properly. My approach is to generate PNG images first, and then convert them to 32-bit BMP using this little tool: https://github.com/thomerow/png2bmp32
Why is the alpha channel white in dxtbmp?
Also, the “white stuff” is the alpha channel layer since the alpha channel, when exported from GIMP as a jpg, appears white in DXTBMP. If the Alpha Channel is white… then nothing within the texture will be transparent. You mentioned it was a jpg and a png… which is it?
Is there a way to export an alpha channel?
(The only program I have to create an alpha channel is GIMP at the moment so I can’t export as PSD or stuff like that). GIMP can export to a PSD and/ or PNG (keyword in saving or exporting to PSD or PNG files is using the “Export as” option). Either will keep an alpha channel intact.