Questions tagged [artifacts]

questions about strange visual discrepancies in renders

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6
votes
1answer
140 views

High start clipping causing dashed edges in 3d view?

I read up that issues sometimes occur with a too low start clipping distance, and since the model I'm working on is pretty huge, I set the start clipping to 1 blender unit. However, I noticed that the ...
5
votes
1answer
616 views

Smoke hi-res fire artifacts in Cycles?

When rendering smoke/fire simulations with cycles I sometimes get some random lines/artifacts on my render. Do you have any idea what might be causing this? There are also some issues with ...
4
votes
2answers
1k views

Smoke Simulation has weird artifacts and looks low res

I can't figure out why my smoke looks like this. It has weird artifacts and looks like it was rendered on 144 resolution. This was actually rendered in 2560 x 3840. I also used 400 samples and I'm ...
4
votes
1answer
630 views

Weird artifacts appeared in eevee because of normal map

I'm was working on a shotgun and suddenly for some reason some weird artifacts appeared on the metal materials. I know that removing the image texture and leaving only a noise texture+bump on the ...
4
votes
1answer
231 views

Why does cycles' volumetrics leave stepping artifacts?

When I render out my rather sharp volumetrics, I get the kinds of artifacts shown in the images and links below. They are obviously produced by step size, and samples stepping through the volume, and ...
3
votes
2answers
696 views

Mesh artifacts only on render

I am making my phone in Blender and my mesh has weird artifacts on rounded corners only on render, not in viewport. Removing doubles and flipping normals doesn't help. I thought it's releated to non-...
3
votes
1answer
27 views

How to fix an artifact affecting a bevel modifier

This is me yet again. I am trying to work non destructively with the use of bevel modifier. I managed to bevel only by weight and adjust the weight of desired edges. However, now when I try to ...
3
votes
4answers
518 views

How can I make transparency act as expected with the internal renderer?

Seems like a z-buffer issue. Everything seems fine in the material preview, but in the render the sky (or transparency, if no sky) "bleeds" a pixel or two between the intersecting part (intersecting ...
3
votes
0answers
234 views

Artifacts when rendering irregular mesh in Cycles (black lines)

when I render with Cycles any mesh (specially planes) with a bit of irregular shape (by using previously, for example, a displacement map) some black lines appear on it. Those black lines are not ...
2
votes
2answers
1k views

Subdivision Surface Artifacts / Topology Issues?

I am trying to create an archway and getting this little artifact with subsurface. I've tried a few things, moving some geometry around but unable to get rid of it. Any insight as to what I need to do ...
2
votes
1answer
57 views

Weird artifacts in shadow when rendering transparent objects

I'm rendering a transparent cup with water + transparent plate. However, the right bottom part of the shadow seem quite off. It has artifacts in the shadow. https://imgur.com/a/djoP72f This is the ...
2
votes
2answers
345 views

Distorted normal map on smooth surface

Blender rookie here. I'm learning about baking normal maps in 2.80 with some pretty basic setup. I'm getting strange results on a smooth metallic flat surface. You can see it on the following ...
2
votes
1answer
441 views

What's causing the colorful artifacts?

I've been using Musgrave textures for years, but in 2.79, I am getting some ugly artifacts along the edges of the object. It doesn't happen in the preview render, only in the final render. Is anyone ...
2
votes
2answers
625 views

How to reduce artifacts on curved text/vector [duplicate]

this is a problem I face a lot when working with branding and typography. After importing vectors/typing, extruding and bending (simple deform or curve modifiers) it always come up with those ugly ...
2
votes
1answer
160 views

Shading Issues with the Array Modifier

I'm working on a model of a car wheel. However, before I continue, I want to fix some shading issues I am having. My model has Subdivision surface, Mirror, and Array modifiers, which make up the 10 ...
2
votes
1answer
80 views

Blender boolean modifier difference make distorsion

I'm trying to create a difference between two objects. Let's see my object below : As you can see, I get a really bad result. I would like to show you my shape before applying the boolean modifier. ...
2
votes
2answers
241 views

strange artifact when rendering volume

I'm using a volume scatter shader to render an atmosphere for a planet. To save on time I used a spherical gradient and ran it through a color ramp to get white only on the rims of the sphere. This ...
2
votes
1answer
2k views

Yellow artifacts when baking normals

I've been searching and trying a few things for the last couple of hours and I can't figure out why there are yellow spots showing up on the normals when I bake them. Originally the wings had the same ...
2
votes
1answer
831 views

Strange texture paint artifacts

I'm trying to paint on my 3D model. UV's are unwrapped with no stretching. Texture is 1024x1024 with alpha. Brush has alpha check as well (I've fiddled with all the brush settings, couldn't find ...
2
votes
1answer
423 views

Cycles hard edges in retroreflective material within a face

I have a problem with a retroreflective material in Cycles. When i render my scene it seems that some faces get rendered differently. The scene contains only one lightsource in form of an emitting ...
2
votes
1answer
611 views

Final render different than preview, black artifacts appear

Update: Added edge split modifier, now it works. I don't understand any of this. I'm going crazy over this. Tried rendering in 2.75 and 2.76b. Same result. I have this piece of a sword that just ...
2
votes
0answers
269 views

Shadow terminator artifacts issues

I work with Blender 2.81a and I have a problem with some artifacts in the shadows of objects with smooth shading. Based on the release note of Blender 2.81 ,(https://www.blender.org/download/releases/...
2
votes
0answers
61 views

Why Transparent BSDF blocks reflections of Principled BSDF? (Cycles)

I wanted to share an issue related to Cycles shaders I don't really know how to face. I am rendering a honey pot. Nothing crazy about this. But when I tried to add the sticker I noticed some ...
2
votes
2answers
264 views

Strange, indescribable color glitching near edges when using viewport shading in Blender 2.8

I am new to this website. I've been having a problem with viewport shading after installing 2.8. I am trying to make a VHS cassette (for no particular reason), but I have a problem that hasn't been ...
2
votes
0answers
245 views

Blender 2.80 displacement texture bug(?)

I thought I better seek help from others to make sure I'm not making a user error here before placing a bug report. In using greyscale displacement maps (textures) in blender 2.80 I've noticed ...
2
votes
0answers
269 views

Edge smoothing problem with solidify + bevel + subsurf

I have started learning blender and I have run into a problem when using solidify, bevel and subsurf together. The problem is that the inner edges of the windows in my object have artifacts: I want ...
2
votes
0answers
457 views

Strange result from baking normal map

I can't seem to figure out what is happening here. A bug possibly? I went from a normal bake result to this. The only thing that changed between the two bakes was the use of a mirror modifier on the ...
2
votes
0answers
48 views

Getting black spots in blender render, render [duplicate]

I'm using Blender 2.79. I've looked at a number of possible answers on this, but none seem to help solve the problem. I'm getting these weird black specs in renders when using blender render. I've ...
2
votes
0answers
832 views

Normal map artifacts in Substance Painter

I am getting artifacts in my normal map when baking high poly to low poly in Substance Painter. I already discovered one thing that can cause these is that the high and low poly objects match too much,...
2
votes
0answers
369 views

Rendering pixel-wise normals as RGB colors - artifacts

I am dealing with the following problem. I have a fixed camera and the mesh representing a surface. I use the cloth simulator and wind source in order to generate various shapes of the mesh. For each ...
2
votes
0answers
68 views

How can I get rid of these artifacts in blender internal? They appear on mesh with subdivision-modifier and lamp with raytraced shadows

When using a lamp with raytraced shadows active, artifacts appear in the shadows on the mesh IF the mesh has a subdivison modifier in the stack. But if I apply the modifier and re-render the ...
1
vote
2answers
118 views

Render Layers causing pixelation

I used this answer (Prevent shadow on object/material A, allow for object/material B) and it helped me a lot. However, this method is causing these jagged black pixels when I am combining them. What ...
1
vote
1answer
51 views

Is it possible to get rid of these shading artifacts for a smooth shaded flat surface?

I am modeling a logo and want beveled edges that will be smooth shaded to look rounded but a flat surface that looks flat do you have any sugestions? This is the result after beveling edges:
1
vote
1answer
39 views

Artifacts on cube after modulo on coordinates

This happens with the following node configuration: It is caused by the modulo (or Fract) operation. I stumbled upon this problem while trying to repeat coordinates on a cube. It works fine on a ...
1
vote
1answer
599 views

Exported model from Blender has holes when imported in Unity

so I have a problem with exporting. I finally have gotten myself to pick up Blender and this is my first attempt at a low poly model created from the ground up. And in blender it seems to render just ...
1
vote
1answer
59 views

artifacts on all my objects

All my objects in all Layers have these kinds of artifacts, anyone know why that may be?, when i hit "P" to play blender game they dissapear, but its super enoying to work with when you are texturing ...
1
vote
1answer
509 views

prevent z-fighting between billboard particles?

In an effect like blossoming flowers and many other particle effects the z order of individual particles doesn't really matter, so can I tell Blender to make them stop z-fighting and causing ...
1
vote
1answer
824 views

How can I clean up Boolean operations?

I'm trying to create a mesh as shown in the image. The best way I could think to do this was to use the Boolean modifier, which looks nice shaded flat. However, this creates a messy topology with ...
1
vote
1answer
184 views

Shrinkwrapping moiré-like artefacts (blender-osm)

I'm having issues with getting a water polygon imported through blender-osm add-on to properly shrink-wrap on the corresponding terrain. Here is what the artifact looks like (the black moiré-like ...
1
vote
1answer
1k views

What can I do to get rid of ugly triangles

I have a problem with baking textures and ambient occlusion. Weird triangles and artifacts appear at end of process. I have tried (i think) everything on internet like soldify, triangulate faces, ...
1
vote
1answer
28 views

UV problem. Artifacts appearing on material

For a while now I can't find the reason for these artifacts appearing. It seems to happen when I do boolean cuts and creates overlaps in my UVs. I thought it was maybe because of the edge split ...
1
vote
1answer
159 views

Strange artifacts

I imported a model but after i set the materials, these strange artifact appeared and the lighting seems wrong. I tried to recalculate the normals, disable/enable the autosmooth and other things but ...
1
vote
1answer
235 views

Strange artifacts on cycles render [duplicate]

Do you have any idea what is causing these artifacts on my cycles render? I'm using a sun light source to illuminate the scene. 128 samples. I've pasted a screenshot of the material that the ...
1
vote
1answer
35 views

Weird UV artifacts in final render

In preview render (with enabled RenderLayer) it looks ok: But in actual final render something strange happening with UV map: I tried to reunwrap mesh, change sample count but result is still the ...
1
vote
1answer
170 views

Fixing artifacts from an imported Medium sculpt?

I'm creating some assets for a game I'm making using Medium by Oculus, but when I import it into Blender it leaves me with strange lighting artifacts. I tried dissolving some vertices and edges to try ...
1
vote
2answers
193 views

Compositing Shadow pass problem

Here is my problem, I need to create 2D aspect animation from 3D model in blender. From the start my rended image is ok But when I transform it, I need to use the Shadow Pass and it looks realy ...
1
vote
1answer
191 views

Why a scene render might have many very dark triangle artifacts?

It was imported from obj and the scene has some environment light and a lot of sun light (the only way to make shadows more ...
1
vote
1answer
403 views

Dealing with Artifacts in The Render?

Please help, I am going insane trying to deal with this. I am pretty new to blender but i've just completed building a character. The face is pretty intricate and I had a feeling it was going to be a ...
1
vote
1answer
554 views

Blocky Textures around object, Blender render artifacts, possible causes?

I'm getting weird render artifacts around the edge of a cylinder on the floor, blocky areas that look low-res: (Edit) Image A: Blocky Textures behind the cylinder Rendering from other angles shows ...
1
vote
2answers
40 views

How to get rid of these artifacts?

I am brand new to Blender. Currently creating donut with tutorial series from Blender Guru and immediately run into problem. Do you have any ideas how to get rid of these ugly artifacts in object mode?...