--- cvsroot/libgender/material.C	2004/11/26 03:48:40	1.51
+++ cvsroot/libgender/material.C	2004/11/27 03:33:51	1.52
@@ -94,13 +94,11 @@
         
         // TODO: negative z is not calculated in an acceptable way, clipping does horrible things(?)
         lz = z (vout.position);
-        z (vout.position) = clamp (
-                               ifelse (lz <= 0,
-                                          lz,
-                                          log (lz + 1) * (2 / log (1e10))
-                                      ) - 1,
-                               -1.F, +1.F
-                            ) * w (vout.position);
+        lz = ifelse (lz <= 0,
+                        lz,
+                        log (lz + 1) / log (1e10 + 1)
+                    ) - 1;
+        z (vout.position) = lz * w (vout.position);
       }
 
       vsh_src = shader::shader_builder::stop ();
@@ -110,11 +108,11 @@
       if (ctx.pass->l)
         {
           ctx.pass->l->fsh ();
-
           fsh (ctx);
         }
       else
-        shader::compile::fout.frag_color = shader::compile::float4 (1., 0., 1., 1.);
+        // many drivers need both vertex and fragment shader, 'caboom!' otherwise
+        shader::compile::fout.frag_color = shader::compile::float4 (0., 0., 0., 0.);
 
       fsh_src = shader::shader_builder::stop ();