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7<H1>Environment Variables</H1>
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10Mesa supports the following environment variables:
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13<li>MESA_DEBUG - if defined, error messages are printed to stderr
14<li>MESA_NO_DITHER - disable dithering, overriding glEnable(GL_DITHER)
15<li>MESA_RGB_VISUAL - specifies the X visual and depth for RGB mode (X only)
16<li>MESA_CI_VISUAL - specifies the X visual and depth for CI mode (X only)
17<li>MESA_BACK_BUFFER - specifies how to implement the back color buffer (X only)
18<li>MESA_PRIVATE_CMAP - force aux/tk libraries to use private colormaps (X only)
19<li>MESA_GAMMA - gamma correction coefficients (X only)
20<li>MESA_XSYNC - enable synchronous X behavior (for X debugging only)
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