mnee.md

instructions for testing manifold next event estimation (MNEE)

compile

compile with config.mk maybe similar to:

MOD_pointsampler?=halton
MOD_sampler?=ptmnee
CFLAGS+=-DPATHSPACE_MAX_VERTS=10

you can use the xorg output module if you want an interactive window, in which case you need to press p to print an image to an output buffer.

if you want to run command line, set

MOD_display?=null

instead of xorg. you can leave away -lX11 then of course.

run

because MNEE is not a complete technique, there will be fireflies left in the render, caused by pt because ptmnee does not cover these paths. to remove these, you'll want to run

./corona scenes/tumbler/tumbler.nra2 --dbor 11

or similar, to enable a couple of dbor layers.

to arrive at the firefly removed image, use

./tools/img/dbor scenes/tumbler/tumblerrender 0.02 -100

the output pfm is in XYZ colour space, look at it with whatever software you like. the minimal semi-useful viewer is probably eu.

you can repeat the above steps with MOD_sampler?=ptdl to compare against path tracing with vanilla next event estimation only.