I think that it may simply be that you’re not applying the texture-transforms in your shader. You’re simply using untransformed texture-coordinates, and thus the scaling is never put into effect.
The texture-transforms are–if I’m not much mistaken–supplied automatically by Panda3D to your shaders, and goes into a uniform array called “p3d_TextureMatrix”–like so:
uniform mat4 p3d_TextureMatrix[];
(As shown here.)
The transforms thus provided are then multiplied by your texture-coordinates to get the final, transformed coordinates–like so:
vec4 finalTexCoord = p3d_TextureMatrix[0] * texcoord0;
(I’m showing that as a single line for the sake of clarity; naturally this can just be done within the call to “texture2D”.)
I wouldn’t like to swear to it, as I don’t think that I’ve worked with multiple texture-transform layers myself, but I imagine that the transforms are indexed just as the textures are–thus “p3d_TextureMatrix[0]” would correspond to “p3d_MultiTexCoord0”, “p3d_TextureMatrix[1]” would correspond to “p3d_MultiTexCoord1”, and so on.
