How do I avoid strange streaky artifacts like these on the concave part of the object?  Tried to remove doubles and beveling with no effect
120552
So I was messing with Subsurf modifier to create a certain sword and then some weird artifacts began to appear (cape-like). I've tried adjusting the Crease, but couldn't achive what I wanted. Basicly, what I whant is the as on the screens, but wo any artifacts :)   Also, here's the .blend file, cause I assume I didn't make myselt 100% clear.
66241
I found there is a circle when the point light through my glass material using the circle render.  How could I solve it?
96926
So I made a 3d model of a sword, and when I try to render it, the program automatically smooths everything out.   Basically, I looked around online, and made sure everything smoothing related discussed there was turned off, and they all were, what should I do?
23995
There are red and pink edges on my mesh.  What do these colored edges mean? How can I use them?
98917
I would like to obtain a realistic rendering with edges not too sharp and smooth surface. I tried adding a crease of 1, but edges are too sharp. Marking edges sharp is too soft. It seems there are some artifacts in the rounded corners...what can I do?
102808
I'm trying to get an accurate index pass for compositing. My geometry (a window in this case) consists of straight lines and it would be nice to have a perfect mask for color correction. As you can see Anti-Aliasing is enabled, but there are still some weird pixels:    Until now my workaround was to blur the image, but in this case straight lines are key to work with. How to achieve this? Is there a render setting to prevent the noise or make it less noisy?
39599
I have imported a mesh (AutoCad DXF) and I'm experiencing strange shading behavior. I've done the following to try and address the problem with no luck:  Recalculate Normals Remove Doubles Delete Loose Geometry Cleared Seam, Sharp, and Bevel Weights  There are no modifiers on the mesh.  The original imported mesh looks fine in smooth shading but I need the mesh to be in quads which causes the shading to mess up as shown in photo. I can add my .blend file but I'm not sure how to do that.
91627
What is the name/type of illustration in which the fill color of an object is slightly offset from its stroke? How is this effect achieved?
122162
Cant figure out why the rendered image has a large black and white artifact (on the bottle on the right)?      Appreciate any tips!
96396
I understand this is a very basic question, but I cannot find the solution. Google &amp; other Stack Exchange gave me no solution either.  I am following Blender Game Asset Creation guide from Blender Cloud, at some point Aidy selects his whole model and does Shade Smooth. Then he selects some edges and marks them sharp.  In Aidy his tutorial you can clearly see the difference between marking sharp and not. As seen here (this is taken from his tutorial)    When I do this in my Blender File, I see no difference. I've tried removing any doubles, but I can not think of anything else. What could be causing this?
78575
I am trying to render an object that has opaque base and gradually becomes clear/translucent at the top in Blender cycles.  Please see the attached image (which was not made with blender).
80796
I'm trying to model a spaceship and I ran into this weird predicament. I'm using a mirror modifier as can be seen and I get this annoying crease:   If I enter edit mode, you can see that the verticies are connected:   And adding mean crease doesn't fix much:   What's a good way to fix it?
19370
I already subdividied the surface, but still getting this raw shadows in between of the spheres.   What can I do?
61182
I can't figure out how to get rid of this red dotted line in the middle of the viewport.
101839
I build a primitive pool table model with holes where the pockets would be but cutting the holes via the Boolean modifier left me with really bad looking lines in the table surface.    I could very well take the time to smooth them out but I'd like to prevent them in the first place. How would I go about this?
10968
For instance, here I have two cubes that are offset only on the x-axis. When I render them (using Blender's internal renderer), the overlapping faces interfere with each other and the result looks awful. A quick and easy solution would be to offset them by just a smidget, but is there another solution that allows faces to overlap and not exhibit this graphical glitch?
38491
Is there a tool or an easier way to remove unneeded geometry from objects? Mostly when using a "Displace" modifier, on many places there are flat surfaces where there is extra geometry on the mesh, that you would like them to be removed. At first I thought of the "Decimate" modifier, but is there a way to do it more evenly. By preserving the edge/face flow and such. Is there some feature for something like that in Blender?   From this      To this      Or to this (if I want the geometry to be to the very limits and worrying only about the shape)