What is PovRay ?
is a freeware raytracer, available here : www.povray.org
It can produce stunning realistic images (see the Hall of Fame
is also highly versatile, allowing for example cel-shading with edges.
PovEdge is meant to
work only with PovRay.
On which platform is PovEdge available ?
Currently, PovEdge runs on Windows only. Hopefully, I will be able to
do a Linux version in the future.
What is PoseRay ?
is a free converter from many 3D formats to the mesh2 PovRay format. It
is available here
Is it very useful to convert the tons of models available
here and there in various formats, and then to use these models with
PovEdge. But it can also improve or repair the models (see below).
• Easy fine-tuning
As the edges are rendered using a PovRay
macro, a lot of parameters can be modified for a better control of the
results. Basically, you simply need to edit the file
"declarations_mymesh.inc". Things should be more or less explanatory.
You can for example:
- apply different contour widths to the
different meshes. To do so, simply modify the width declared for each
object before its macro call. This is very useful if you have meshes
with very different sizes.
- apply different thresholds to the
different meshes, by changing the parameter EdThresh before each macro
- apply different colors to the
different meshes. The textures for the edges are also defined
before each macro call (parameter " Cyltex"). Colored edges
(non black) can be classy !
- remove some edges from the
union defining the objet "Edges_mymesh". To do this, simply comment
some lines in the declaration of Edges_mymesh, at the bottom of
"declarations_mymesh.inc". This is useful to remove for example some
unwanted creases edges for certain meshes.
Useful things to do using PoseRay
converting 3D models to the mesh2 format, PoseRay can many other useful
things for the PovEdge user. You can:
- subdivide the models, to get a finer
mesh. You will get smoother edges (and shadows) with a finer mesh.
- weld the models (this is done in the
"Groups" tab, check "Weld vertices" and then click "update"). This can
remove some unwanted edges when the model should be connected but is in
fact composed of several pieces.
- correct the normals by re-calculating
them (with "Calculate normals", right above weld). Sometimes, models
have some errors in the normals, without visible effect on a standard
render of the object, but which gives wrong edges. Re-calculating the
normals solves this.
PoseRay can also import the mesh2 format. Although this sounds stupid
at first (why should I import a PovRay model in a converter to the
PovRay format?), it allows you to subdivide PovRay models, or to
correct them ! It is also useful if PovEdge has problems at parsing the
mesh file (this can happen sometimes when the syntax is not 100%
standard): simply import it in PoseRay (which is more robust at parsing
non standard syntax), and export it. PovEdge can always parse the
models exported from PoseRay.
• How do I get a cel-shading like texture ?
There is room for lots of
experimentation here. To get a "flat" texture, use a low brilliance
(smaller than 1 which is the default), or even 0. Put a single
light-source, and put a decent amount of ambient in the texture.
• When I use
toon shading textures with low brilliance, I get strange shadows (the
borders of the shadows are jagged)
This is an annoying
problem which is specific to the combination of mesh and low or zero
brilliance. It can be fixed by subdividing the mesh (for example with
PoseRay, see Tips&Tricks), to get a smoother border between
shadowed and non-shadowed parts.
• I can't get the crease
edges right: with a low EdThresh I get none, but if I increase EdThresh
I immediately get artifacts.
Crease edges can be
difficult to get right sometimes, specially with low-poly
meshes (because in a
low-poly mesh, the angle between two neighbourhing face is quite large
even for smooth
parts of the mesh, where crease edges should not be present). A
solution can be
simply to subdivide the mesh (for example with PoseRay, see