Hi lklab,
Unfortunately avatar materials do not currently support exporting unfiltered textures like you are using in your scene. You may be able to turn it on manually through code.
The checkerboard effect you are looking at is an artifact of multisampling alpha - a technique that prevents draw order artifacts. Normally this shouldn't be on in your model unless you've explicitly turned on GL_SAMPLE_ALPHA_TO_COVERAGE_ARB, but it's possible that it's being set by your graphics card.
For references, this is how you would normally turn it on, with higher sampling giving smoother results.
Quote:
import viz
viz.setMultiSample(4)
#higher values increase quality but decrease framerate.
#usually set between 2 and 16
viz.go()
transModel = viz.add('model.IVE') #add a model, call it tranModel
GL_SAMPLE_ALPHA_TO_COVERAGE_ARB = 0x809E
transModel.disable(viz.BLEND)
transModel.enable(GL_SAMPLE_ALPHA_TO_COVERAGE_ARB)
viz.clearcolor(viz.GRAY)
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