Qtd3 + many small textures.

[DDDIM]

Hello everyone!

I am programming on Beagleboard+qt4.8+qt3d(in qml).

I have dynamically generated textures and dynamically load them to OpenGL in a separate thread (this feature was introduced in qt 4.8). I access qml Item3d element from c++ using objectName property. I want it to consist of several textures. For each texture I have to create its own material.
I have weird slowing down of my application if I for example create 16 materials with texture size 1x1 pixel. But at the same time if I create one material with texture 1024x1024 pixels, it works very fine. I can not understand what am i doing wrong.
Does anyone know explanation or assumption?

Please tell me if you know better place for asking this question...

Thanks!