Brush Creation Commands
Note: Before creating a brush, use mouse+left click to draw out a selection in the 2d view, it will be outlined in red. Then use the keys below to control the amount of sides. When you have created the brush, hit ESC to exit, or use the mouse to manipulate the brush size.
Action Description Key
Brush (3 sided) Creates a 3 sided brush CTRL+3
Brush (4 sided) Creates a 4 sided brush CTRL+4
Brush (5 sided) Creates a 5 sided brush CTRL+5
Brush (6 sided) Creates a 6 sided brush CTRL+6
Brush (7 sided) Creates a 7 sided brush CTRL+7
Brush (8 sided) Creates a 8 sided brush CTRL+8
Brush (9 sided) Creates a 9 sided brush CTRL+9

Brush Manipulation Commands
Action Description Key
Drag Edges Sets mouse+left click to Edge editing mode - Edges are represented by dots. Hit ESC when done. E
Drag Vertices Sets mouse+left click to Vertex editing mode - Vertex's are represented by dots. Hit ESC when done. V
Make Detail Makes a brush a detail brush (not in q3) CTRL+M
Toggle Clipper Turns clipping mode on or off. X
Split Selected Splits the selected brush/brushes on the clipping plane while in clipping mode - X key toggles clipping mode on or off. CTRL+ENTER
Flip Clip Switches the plane on which the brush is going to be clipped while in clipping mode - X key toggles clipping mode on or off. CTRL+ENTER
Clip Selected Clips the currently selected brush / brushes while in clipping mode - X key toggles clipping mode on or off. ENTER
Curve Manipulation Commands
Action Description Key
Bend Mode This is used to bend patch meshes. Follow the instructions in the dialog box. B
Cap Current Curve Caps off the currently selected patch mesh. SHIFT+C
Clear Patch Overlays   CTRL+Y
Connect Selection   CTRL+K
Cycle Cap Texure Patch   CTRL+SHIFT+N
Decrease Patch Column   CTRL+SHIFT+
SUBTRACT
Increase Patch Column doesn't work CTRL+SHIFT+
PLUS
Decrease Patch Row   CTRL+
SUBTRACT
Increase Patch Row doesn't work CTRL+PLUS
Freeze Patch Vertices   F
Invert Curve This inverts the patch meshes matrix CTRL+I
Invert Curve Texture X Inverts the X value of the texture on the matrix. Sometimes it needs to be done. CTRL+SHIFT+I
Invert Curve Texture Y Inverts the Y value of the texture on the matrix. Sometimes it needs to be done. SHIFT+I
Make Overlay Patch   Y
Naturalize Patch Makes the texture natural on the patch mesh. (Sometimes the textures are stretched to fit the patch. This will make the texture fit normally.) CTRL+N
Patch Tab   TAB
Patch Inspector   SHIFT+S
Snap Patch to Grid Snaps the vertex's of the currently selected patch mesh to the grid. CTRL+A
Thicken Patch Creates a copy of current mesh and spaces it by X amount of specified units and caps off the mesh. SHIFT+5
Unfreeze all Patch Vertices   CTRL+SHIFT+F
Texture Manipulation Commands
Action Description Key
Surface Inspector Brings up the surface properties menu - use to adjust texture size. S
Texture Decrement   SHIFT+
SUBTRACT
Texture Increment   SHIFT+PLUS
Texture Rotate Clockwise Rotates the texture on the currently selected face,brush or mesh Clockwise SHIFT+
PAGE DOWN
Texture Rotate Counter-
Clockwise
Rotates the texture on the currently selected face,brush or mesh Counter-Clockwise SHIFT+
PAGE UP
Texture Scale Up / Down /
Left / Right
Scales the texture on the currently selected face,brush or mesh. CTRL+
Arrow Keys
Texture Shift
Up / Down /
Left / Righ
Shifts the texture on the currently selected face,brush or mesh. SHIFT+
Arrow Keys
Texture Fit Fits the texture to the currently selected face,brush or mesh by scaling it on the x & y axis. SHIFT+5
Toggle Texture Lock Turns Texture lock on or off. SHIFT+T
Toggle Texture Rotate Lock Turns rotation of textures on or off.  

Miscellaneous
Action Description Key
Entity Color Changes the color of an entity by bringing up the standard windows RGB color selector. Used for choosing the color of lights for example. K
Redisperse Columns   CTRL+E
Redisperse Rows   CTRL+SHIFT+E