Tweet
Mari has the ability to paint vector maps that could be used in the vray fur map channels to "comb" the hair. I'm trying to get a handle on the best settings in Mari to produce maps that are compliant with vray fur. The following are excerpts from the Mari manual (http://thefoundry.s3.amazonaws.com/p..._UserGuide.pdf) followed by my questions:
This part is the most confusing to me. I would initially think that I would want to paint flow rather than paint normal, however since, according to the vray manual, "the blue component is the offset along the surface normal" perhaps I want to paint a normal map rather than a flow map?
Do vray fur maps work with screen space or world space?
[/FONT]
I assume Vray looking for a -1.0 to 1.0 map as opposed to 0 to 1 or flipped Y, is that correct?
Vray says
while Mari says:
Are these two ways of saying the same thing? or are the two color schemes different and thus incompatible?
Code:
The Paint Flow Vectors and Paint Normal Vectors modes are an alpha blend between the vectors. The Nudge Flow Vectors and Nudge Normal Vectors modes add the vectors together to get the blend result. The paint flow and paint normal modes convert the painted vectors into the texture’s tangent space before creating the associated blend. This conversion takes into account the orientation of the texture on the model’s surface. [FONT=sans-serif]The flow and normal vector modes refer to how the vectors are allowed to act in xyz space. Flow modes keep the vectors flat against the surface of the model. Normal modes allow the vectors to protrude outwards from the model in tangent z space. The type of vectors you want to paint may influence which paint blending modes you use. For example, flow modes are most often going to be used for flow maps, while you may prefer using normal modes for creating normal maps
Code:
The Vector (Screen Space) shader is for viewing vector (colors) in tangent space, while the Vector (World Space) shader is for viewing vector (colors) in world space.
Code:
[FONT=sans-serif]File Space fields allow you to set whether the channel or image should be exported as a Normal file (in the way Mari stores them), as a [/FONT] [FONT=sans-serif]Vector file (-1.0 to +1.0 range), or as a Vector (flipped Y) file, which is the same as the Vector file in terms of range, but inverts the vectors in the Y direction. [/FONT]
Code:
Vray says
Code:
The red component is offset along the u texture direction, the green component is the offset along the v texture direction, and the blue component is the offset along the surface normal
Code:
Left to Right: pink (RGB: 1, 0.5, 0.5) Right to Left: turquoise (RGB: 0, 0.5, 0.5) Top to Bottom: green (RGB: 0.5, 1, 0.5) Bottom to Top: purple (RGB: 0.5, 0, 0.5)
Comment