fix texture misalignment + negative far plane

FModel/Resources/default.frag

@@ -34,22 +34,23 @@ uniform Material material;
 uniform Light light;
 uniform vec3 viewPos;
 uniform bool display_vertex_colors;
+uniform int numTexCoords;
 
 out vec4 FragColor;
 
-int LayerToIndex(int max)
+int LayerToIndex()
 {
-    return min(int(fTexLayer), max);
+    return min(int(fTexLayer), numTexCoords - 1);
 }
 
 vec4 SamplerSelector(sampler2D array[8])
 {
-    return texture(array[LayerToIndex(7)], fTexCoords);
+    return texture(array[LayerToIndex()], fTexCoords);
 }
 
 vec4 VectorSelector(vec4 array[8])
 {
-    return array[LayerToIndex(7)];
+    return array[LayerToIndex()];
 }
 
 vec3 getNormalFromMap()

FModel/Views/Snooper/Material.cs

@@ -110,8 +110,12 @@ public class Material : IDisposable
         if (top)
         {
             for (int i = 0; i < array.Length; i++)
+            {
                 if (Parameters.TryGetTexture2d(out var o, triggers[i]) && cache.TryGetCachedTexture(o, out var t))
                     array[i] = t;
+                else if (i > 0 && array[i - 1] != null)
+                    array[i] = array[i - 1];
+            }
         }
         else if (Parameters.Textures.TryGetValue(fallback, out var u) && u is UTexture2D o && cache.TryGetCachedTexture(o, out var t))
         {

FModel/Views/Snooper/Model.cs

@@ -250,6 +250,7 @@ public class Model : IDisposable
         _vao.Bind();
         shader.SetUniform("uMorphTime", MorphTime);
         shader.SetUniform("display_vertex_colors", DisplayVertexColors);
+        shader.SetUniform("numTexCoords", NumTexCoords);
 
         GL.PolygonMode(MaterialFace.FrontAndBack, Wireframe ? PolygonMode.Line : PolygonMode.Fill);
         for (int section = 0; section < Sections.Length; section++)

FModel/Views/Snooper/Renderer.cs

@@ -94,7 +94,7 @@ public class Renderer : IDisposable
 
     private Camera SetupCamera(FBox box)
     {
-        var far = box.Max.Max();
+        var far = Math.Abs(box.Max.Max());
         var center = box.GetCenter();
         return new Camera(
             new Vector3(0f, center.Z, box.Max.Y * 3),