I've finally gotten around to experimenting with 3.7 beta (beta.39, 64-bit) and
ran into this unexpected anomaly (see binaries.images). The scene is made up of
3 cylindrical spotlights projected through 3 image_map "slides" onto a
superellipsoid cube. A simple scattering media is used to make the light rays
visible. In 3.6 (left image) the scene renders as predicted [except it crashes
3.6 when more than 2 lights are used (Windows 7, 64-bit)] but in beta, instead
of a continuous beam, the upper spotlight creates a grainy haze. Note that in
3.7 beta it only applies to the light directly overhead from +y and not to the
those coming from +x and -z. If the y beam is offset slightly, the effect
disappears.

Steve

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