Hi Peter, thank you for answering so fast.
I tryed with precision and several numbers but the problems stands. By creepy I mean that the image is not smooth at all it's like scratched. I have made some screenshots so it's easyer to understand: with an amount of 8 for each segmentsW and segmentsH (the second one is in action): http://www.madebyg.com/test/planeLowSegmentHW.jpg http://www.madebyg.com/test/planeLowSegmentHW2.jpg and with an amount of 20 for each segmentsW and segmentsH (the second is in action too): http://www.madebyg.com/test/planeHighSegmentHW.jpg http://www.madebyg.com/test/planeHighSegmentHW2.jpg from what I have tested so far it seems that the problem mostly shows when setting both segmentsW and segmentsH and most particularly segmentsH. I have made a try by setting only segmentsW and the result was better. Also it appears when from a value superior than 10
