In my map, I am making a hill. However, I can walk right through the hill. How do I make it solid? Also, in my other thread, (
http://66.227.96.58/showthread.php?s=&threadid=119533) see if you can help me. TIA 
 MK
  
 
  
  
    What did you make the hill out of? If brushes, make sure that there aren't any shaders with "surfaceparm nonsolid" on any faces of the brushes. If patches, make sure the matrix is facing upwards...and there aren't any nonsolid shaders on em. If a model, put clip brushes around it.
  
 
  
  
    It is a patch. How do I tell if a shader is nonsolid?
 
 MK
  
 
  
  
    If the shader code says "surfaceparm nonsolid" in it. :)
  
 
  
  
    Here it is. I don't think its nonsolid...
 
 textures/yavin/ground_grasssprite
 {
 qer_editorimage textures/yavin/ground
 q3map_material ShortGrass
 cull twosided
 {
 map $lightmap
 }
 {
 map textures/yavin/ground
 blendFunc GL_DST_COLOR GL_ZERO
 }
 {
 map gfx/sprites/grass2
 surfaceSprites vertical 32 24 42 500
 ssFademax 1500
 ssFadescale 1
 ssVariance 1 2
 ssWind 0.5
 alphaFunc GE192
 blendFunc GL_SRC_ALPHA GL_ONE_MINUS_SRC_ALPHA
 depthWrite
 rgbGen vertex
 }
 }
 
 MK