I noticed some strange blue pixels on the edges of terrain and at a far, so I assumed that there was a bug in my mipmap generation code. I turned off mipmapping and loaded each mipmap level into the texture looking for a problem, and strangely enough at level 5 there was a big blue dot on the texture. I spent a while looking for the bug and finding nothing I just put in a 'memset(data,0,bytes)' call in. All the lower levels turned black, but level 5 continued to have a blue dot on it (but with black everywhere else). I spent a while wondering what was going on and out of desperation I created a buffer of size bytes*2 (where bytes is the right size of bytes per pixel * width * height * depth) and set it to 0, then passed a pointer to that to glTexImage3D, and strangely enough I got all black.
I'm somewhat confounded as to what's going on here, perhaps it has something to do with the fact that level 5 is 2x2x1; however I found nothing in the documentation about a minimum that that is below. The value of bytes is 12, the format is GL_RGB, type is GL_UNSIGNED_BYTE.
Here is a picture of what's going on:
Sorry to post so often, I spend at least a half hour (and often longer) messing with things before I post.
Thanks, ~SPH
EDIT: Interestingly if I create a buffer twice as large, set it to 0, then copy the correct image in at the beginning then I get this (only one tile drawn so that the pattern is clearer):
[Edited by - ShmeeBegek on November 27, 2005 3:20:31 PM]
