hi friends I want to make a terrain with 6 texture layers, I'm going to use the multitexturing technique used in the effect file provided by Mr. Frank Luna, but this effect can use only 3 textures for multitexturing, of course it generates really great results, but I need 6 textures, can I use this technique, how should I modify it? or should I use something else, here is the pixel shader used in this effect: // Layer maps are tiled float3 c0 = tex2D(LayerMap0Sampler, tiledTexC); float3 c1 = tex2D(LayerMap1Sampler, tiledTexC); float3 c2 = tex2D(LayerMap2Sampler, tiledTexC); float3 c3 = tex2D(LayerMapCloudSampler, cloudTexC); // Blendmap is not tiled. float3 B = tex2D(BlendMapSampler, nonTiledTexC); // Find the inverse of all the blend weights so that we can // scale the total color to the range [0, 1]. float totalInverse = 1.0f / (B.r + B.g + B.b); c0 *= B.r * totalInverse; c1 *= B.g * totalInverse; c2 *= B.b * totalInverse; // c3 *= B; float3 final = (c0 + c1 + c2 + c3) * shade; return float4(final, 1.0f); in this effect, the blend image should have 3 colors including pure red, pure green and pure blue. how should I make my blend image? what colors should it have? can I use R, G, B, RG, RB, GB? please help me thanks in advance

A little off topic, but if you're going to use 6 texture stages, you're going to limit the number of cards that will be able to work with your application. For instance, my GeForce 4 can only handle 4 texture stages.