[aitraaz]

Which app? If 3d max, make sure the box is checked next to the color slot...otherwise try converting the bitmaps from one format to another, or check image info in photoshop to make sure its compatible with MR.....

[Mihai]

Safest format to use for now is jpg, in rgb. No greyscale maps even for b/w bumps.

[Mihai]

Could you post the scene, or a simplified version?

[Maximus3D]

How much ram have your system got ? i'm not sure this is relevant.. but i recently ran into this problem too, all my objects had lots of textures applied to them and all was fine yet it rendered completly without textures, possibly it's a ram issue that you run outta it. But that depends.. perhaps with more info about your problem it's possible to track down the root of this too.

/ Max