HDR Texture Format Issues

[cireneikual]

Hello,

I added HDR rendering to my game, but I cannot find a HDR texture format that works across all systems and doesn't produce artifacts. This format:

glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB16F, m_width, m_height, 0, GL_RGB, GL_FLOAT, NULL);

Gives me really strange black pixelated box artifacts that surround various areas of the screen. It also doesn't downsample properly when determining the scene luminance, so everything gets very bright.

I was able to get rid of these artifacts on my system by changing the format to:

glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB16, m_width, m_height, 0, GL_RGB, GL_FLOAT, NULL);

From what I have read, that isn't even an HDR format, since GL_RGB16 clamps values to [0, 1]. But for some reason it works on my machine.

Neither of these formats run on the other machines I have tested besides my own.

What could be causing the artifacts? What format should I use?

Thanks for any help you can offer.