       	       	  Raytracer   Radiosity     SGI GL      Gralphigs     X11 Shader	     
* Rendering Facilities *
Transparency   |    yes     |  	no       |yes(no refr)| no         |    no      |
Emission       |    no      |   no       |  yes       |   no       |    no      |
Texture        |    yes     |   no       |  no        |   no       |    no      |
* Output Primitives (without High Levels) *				       
Polyline       |    no      |  no        |  yes	      | yes        |    yes     |
Polygon        |    no      |  	no       |  yes	      | yes        |    yes     |
Polymarker     |    no      |  	no       |  yes	      | yes        |    yes     |
Polyhedron     |    no      |  	no       |  yes	      | yes        | yes(buggy) |
Quadmesh       |    no      |  	yes      |  yes       | yes        |    yes     |
Quadric        |    yes     |  	no       |  no        | no         |    no      |
* Light  Primitives *                      	        		       
PointLight     |    yes     |  yes       |  yes	      | yes        |    yes     |
AmbientLight   |    yes     |  no        |  yes	      | yes        |    yes     |
* Additionals *                      		        	       
Tk Pixmap      |                         |  yes	      | no         |    yes     |
Radiosity      |                         |  yes	      | no         |    yes     |
