BPR Render Intro
BPR- best preview render
(not PVR- physically based render ), ZBrush does not have it.
SHIFT+R
Render- is Lighting and Material.
Good render is the good lights with the right materials.
Light
-3 Key Light System-
Key Light
Fill light
Rimm Light ( Back)
The First light,that is on by default is pretty much your Key light.
*Don't cranck up your Light strength too high- it is not realistic.
*Distance- the lower it is, the more it clipps shadows. Better don't touch it.
*Ambient- if you put it up, it lightens the colors...Better don't touch it either.
For realistic renders, better don't put in crazy saturation colors. Keep it subtle.
To make the light into a Rimm Light, get a mouse and click on the Dot on the Sphere in the Lighting render.
*Mess with lights separately, turn off other lights while setting up one.
Some people just use 2 Lights when rendering in ZBrush
BPR Shadows
FStrength - For the Floor to get shadows- lighter - darker
GStrength - the shadows on the model, for it to get lighter/ darker
Establish Shadow Resolution. To find a good one Start with double the amount you Document width resolution(the widest size). ( in Document-> Width..)
Rays - how many light beams it sends
Angle- the angle that the rays are spreading in
Angle- the angle that the rays are spreading in
When angle is set to 0 - it shoots all Rays as one. As soon as you spread up the angle, it creates a cone to cast out Rays. Start with 10 , Render to see the difference.
*If you don't see the Difference, tweak the Model a bit. If you don't do it, Zbrush will give you the old Shadow that it has stored.
Sharp shadow = High Rays^ + low Angle
Wide shadows= Low /mid Rays + High Angle
Wide shadows= Low /mid Rays + High Angle
Soft Shadow= pretty low/mid Rays + High Rays
L Depth- Light Depth- moves the light closer/ farther from the object
Don't really touch other settings. If you want the Blur, do not use the Blur, but play with Rays and Angles.
LightCaps
You get a lot more control with this system.
*Turn the usual light intensity really low.
Control the LightCap
-
Aperture- makes the beam diameter smaller/ wider
Falloff- how fast the light will start to fade and lose its intensity. Sharp/ soft of the diameter
You can have the light not casting shadows- in case of imitating bouncing light
GOBO- an alpha for the light. You can add alpha for it, then tile it and mess with Width, Scale, Blur an Orientation of it.
For the setting of Diffuse and Spec - you can control the separately and control opacity and all that stuff...
Diffuse
Specular
HDRI Img Lighting
You can create Lighting from HDRI. Creates img, that looks scpherical and wraps around as an environment.
Background-> turn On Img-Import -> Turn on the big LightCaps button, so it creates the light from the HDRI Img and has it effect the Sculpt.
Click the Rotate with object for the img not to rotate with the object. Use Longitude to rotate the img.
Click the Rotate with object for the img not to rotate with the object. Use Longitude to rotate the img.
To have shadows on the floor, turn On the Floor.
If you want, you can turn off the Background and it will still have the light affecting the object.
http://www.hdrlabs.com/gallery/index.html
free HDRIs...
free HDRIs...
Material
-2 Types of Materials in ZBrush-
Standart Material
MatCap - the lighting is already BAKED in the material and the lighting you are trying to create will not effect it in any way.
Use Standart materials when you start messing with lights.
*Skin Shade -> switch to it when you paint. As you sculpt, it is not the best one cause it wont reflect the lights and shadows that well and will appear really flat.
*Toy Plastic for Eyes
You can assign different Materials to Different Subtools as well as different materials to one subtool.
To assign Material to a separate Subtool, select the subtool-> switch to M at the top, turn off the RGB -> select the material that you want for the subtool-> Color- Fill Object
MRGB- color+material
RGB- color
M- material
Do Not have Eyes and Teeth and anything else the same material. When you change material, it changes material on all subtools that don't have the materials assign to it. After you fill a subtool with a material, it wont switch material every time you change it for other subtools.
If it is all one subtool, have only the thing you want to fill visible. Hide other things.
Mask stuff you don't want to have the material assigned to.
To paint some different material, turn on M or MRGB (will paint material and color at the same time) aaand paint it! Tada
But if you want lets say blur the edge, you can only do that as the Global change in Render settings- it will show the blur btw materials when you render. The higher the resolution, the less riggid the material edge will look.
Render Properties-> Materials Blend Radius- blur Materials on one Subtool together ( pixels).
AO
( ambient occlusion) -looks for spots, where light cant get and makes it dark. Just shadows cant do that.
- shadows on ------ ambient occlusion on
- put resolution the same,as you have in shadows
Rays
Andle...all the same stuff
Gamma setting - controls transition from lights to darks. When its too low- more darks, higher -> more lights.
in the Render Passes it will show you all the maps, that were generated for the render. You can export it to Photoshop and mess with it in Photoshop if you want.
Transparency
Display Properties-> BPR Settings-> Visibility //Transparency//....
turn on the button BPR Transparent Shading, say yes when it asks you that you don't have the Transparency on in the BPR Renders.
Transparency
- Mesh Normal
-Color
BPR Transparency
Strength- controls the Mesh Normal. Looks at camera= 100% transparent. If you change it, it will get slightly more foggy.
Color- looks at color info. Pure Black= 100% transparent, White= opaque. You can use paint!
Refract and RFactor don't work.
Some amazing ZBrush Renders.......
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