Hello Jcl,

thank you for the quick response, but using prepared alpha maps does not solve my problem, because I want to generate the ground textures at run-time. I have a 24x24km area and a feature map showing yellow for main roads, grey for secondary roads, blue for water, two shades of green for wood and so on. From this I want to calculate 8 different alpha maps for the multi-texture terrain. But besides that I am a little afraid that it might have too much impact on FPS. So, as a workaround I prepared normal tex maps by hand, but that does not look so good.

Best regards
Henning

By the way, A7 is a great tool, exactly what I looked for since 25 years, when I started with VRML.