Hi there, i’m new to blender and seem to be having a problem with the rendering of a model. Parts of the model that are under low light conditions renders with dark triangles. How do i get rid of that, or was i meant to do something during the modelling process?
Post a render? Not much anyone can do to help without seeing the problem.
I experienced something similar, it turned out it was a modelling/raytracing artefact.
For me, the simple solution was to modify my scene so it didn’t need raytracing for the render.
Give this a try first, then call me in the morning if symptoms persist…
It does seem like turning off raytracing does help, but that’s not a real solution.
Here’s a pic of what i mean.
Try removing doubles, recalculating the normals (ctrl+n) or checking for unneeded faces on the interior of your model. Hope this helps.
DwarvenFury
From the render you posted, it’s hard to tell if this is similar to the problem I’ve seen before.
With a Subsurfed mesh, the area on an object where light transitioned to shadow showed large black squares/triagles. It seemed that while the mesh was rendered smooth, the transition area revealed the geometry of the lower-poly version of the mesh (which is made up of larger square/triange faces, with solid shading).
Can’t remember what I did to solve the problem . . . I’ll get back at a later time, unless someone else provides the solution.
In the meantime, try this (assuming you are using the Subsurf modifier):
Make a duplicate of the model and move the original to another layer (to retain an editable version). ‘Apply’ the Subsurf modifier to your copy and render to see if the artifacts remain.
Thanks for the help so far. Ill try the unneeded faces check later, though i’m not sure if that’s the reason. A pause of the initial render shows all the triangles and they coincide exactly with the artifacts.The model actually has subsurf applied to it. Strangely enough after animation of the body and camera, the triangles don’t appear in the avi.
My mistake ray tracing was disabled. The avi does contain the same artifacts.
It could be that those faces were twisted somehow. If removing doubles and making sure all the normals are facing the right way didn’t help, the only other suggestions I could think of would be to turn off subsurf and see if any of the offending faces are twisted into strange shapes.
You also might want to try moving lights around to see if that has any effect-- it could also be a shadow bias issue, although that doesn’t look the way those usually look. Then again, the image is small and it’s hard to tell what’s going on.
Hi thanks for all the help, looks like a remove doubles got rid of the artifacts.