Light Path Expression Builder

LPE output

The current graph represents the following LPE:

The LPE captures the following ray paths:

LPE render element script

Specific script that generates a new LPE render element with the current expression


				

				

					

				

				


			


			

				
Node edit

				

					

						
						

							
R

							

								
R

								
T

								
V

								
.

							

						

						
					

					

						
						

							
D

							

								
D

								
G

								
S

								
.

							

						

						
					

					

						
						

							
None

							

								
None

								
?

								
+

								
*

							

						

						
					

				

				

					
					
				

				

					 
					 
					 
				

				

					
					
					
					
					
				

				
				
			


			

			

				

				

					
					
				

				

				

					
Initial ray spawn event

					
CCamera ray


					
Ray spawn event

					
RReflection ray

					
TTransmission ray

					
VVolume ray

					
.Arbitrary ray spawn event


					
Scattering type

					
DDiffuse scattering

					
GGlossy scattering

					
SSingular scattering

					
sStraight (no) scattering

					
.Arbitrary scattering type


					
Path termination event

					
LLight hit

					
OEmitting object hit

					
BBackground hit


					
Modifier

					
?Zero or one repetition

					
=One or more repetitions

					
*Zero or more repetitions

				

				

				

				

					
General

					
Ctrl + ZUndo

					
Ctrl + YRedo

					
F8Save

					
F9Load


					
Graph navigation

					
SpaceSelect camera node

					
↑Select parent node

					
↓Select first child node

					
←Select left sibling

					
→Select right sibling


					
Node editing

					
Shift + REvent: R

					
Shift + TEvent: T

					
Shift + VEvent: V

					
,Event: . (any)

					
Shift + DScatter: D

					
Shift + GScatter: G

					
Shift + SScatter: S

					
Shift + NScatter: s (straight)

					
.Scatter: . (any)

					
Shift + /Modifier: ?

					
Shift + =Modifier: +

					
Shift + 8Modifier: *

					
LToggle Light

					
OToggle Self-Illumination

					
BToggle Background

					
'Focus label field

					
[Add node (+)

					
]Remove node (-)

					
EnterUpdate node

					
NNew subpath

					
RRemove subpath

					
SSimplify