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Hey Vlado. So you'll remember we had this thread where we were finding a lot of strangeness with the vrayCurvature map:
http://forums.chaosgroup.com/showthr...ature-Feedback
The thread kind of ended with you saying that the raytraced technique itself may be the problem and you might just remove it from the UI. Well, another user poked me and gave me some extra info, and I did some more testing, and it turns out that all of the problems we experienced with the map are basically due to two issues. Here's the issues...
1) Concave and convex curvature generate the same color. See enclosed image curtain.jpg. What I would expect would be the concave areas would be blue, the flat areas red, and the convex areas yellow. In the vraycurvature map, curved areas are yellow and flat areas are blue. There are many instances where you want to label the convex and concave areas differently to apply different effects (like scratches on convex and dirt in concave).
2) Sample spread appears to be in world space. A lot of artifacts in our example images seem to be caused by this. See attached images Scaledifference A and B. A is vraycurvature, which has the screws all black, because the screws are much smaller than the size of the larger cylinders, and so setting the sample spread for the larger cylinders makes that value too large for the screws. Image B was generated using the boomerlabs curvature plugin, which gives much more expected results, based solely on curvature and not on object size.
So, are these two issues easily solvable? Because if they are, we can use the vraycurvature to replace the need for the other techniques out there, which would be incredibly useful to everyone. Thoughts?
- Neil
http://forums.chaosgroup.com/showthr...ature-Feedback
The thread kind of ended with you saying that the raytraced technique itself may be the problem and you might just remove it from the UI. Well, another user poked me and gave me some extra info, and I did some more testing, and it turns out that all of the problems we experienced with the map are basically due to two issues. Here's the issues...
1) Concave and convex curvature generate the same color. See enclosed image curtain.jpg. What I would expect would be the concave areas would be blue, the flat areas red, and the convex areas yellow. In the vraycurvature map, curved areas are yellow and flat areas are blue. There are many instances where you want to label the convex and concave areas differently to apply different effects (like scratches on convex and dirt in concave).
2) Sample spread appears to be in world space. A lot of artifacts in our example images seem to be caused by this. See attached images Scaledifference A and B. A is vraycurvature, which has the screws all black, because the screws are much smaller than the size of the larger cylinders, and so setting the sample spread for the larger cylinders makes that value too large for the screws. Image B was generated using the boomerlabs curvature plugin, which gives much more expected results, based solely on curvature and not on object size.
So, are these two issues easily solvable? Because if they are, we can use the vraycurvature to replace the need for the other techniques out there, which would be incredibly useful to everyone. Thoughts?
- Neil
Attached Files
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