texture warning

[cheerioboy]

warning: Texture "Map #7731" returned an invalid bump normal (XYZ -1.#IND,-1.#IND,-1.#IND).

Any clues as to what this means? It's appearing during the lightcache calculations and I wonder if it's affecting the speed of the render. The warning has popped up 8 times in a row already.

canceled and got another warning
warning: Material returned overbright or invalid color (object "Rectangle022",RGB:-1.#IND,-1.#IND,-1.#IND)
going to investigate this object...

[cheerioboy]

Both issues were connected to the same material, which had a .jpg texture in the diffuse that was a white paint swatch (248,248,24. Map #7731 is the bump map on that material which is a grungy black & white .jpg texture.

Re-rendering.

[vlado]

It's good to fix those warnings; they do slow down the render a bit.

Best regards,
Vlado