It can be said that problems such as noise in 3dmax rendering are relatively common during the rendering process. Everyone has encountered the problem of VR rendering images with strong graininess and noise.
What causes the graininess in 3dmax rendering? How to solve it?
The editor of CG MAGIC has sorted out 6 reasons and solutions for grainy and noisy renderings in 3dmax.
1. The 3dmax image size is too low, causing the effect image to be grainy, noisy and unclear.
Solution:
If the pixels of the 3dmax material are not high in nature and are used enlarged, then the image will be blurred if the size is relatively large. You can process the texture in PS and re-assign the material to the model to effectively avoid the blurry and grainy feeling after the model is rendered. Noise situation.
2. The main light source in the 3dmax software is not subdivided enough.
Solution:
The subdivision of the 3dmax main light source is generally around 20. It does not need to be too high, because this will directly affect the rendering time. The subdivision of hemispheric light and spherical light is generally at least 30 or more.
3. The 3dmax material is not subdivided enough.
Solution:
Generally speaking, the main materials in the 3dmax scene, such as floors, latex paint, and material subdivisions closer to the camera will be increased to about 20. Of course, if your machine configuration is good enough, you can increase it, and the effect will be positive. of.
4. Affected by the luminescence map and light cache.
Solution:
Generally speaking, the maximum ratio and minimum ratio are -3.-1, and the hemispheric subdivision and interpolation sampling are about 50. The subdivision of the light buffer is between 1000 and 1500. Of course, the larger the value, the better the effect. Check the pre-filter and set it to 20.
5. DMC sampling parameters will affect
The rendered image has a grainy feel.
Solution:
The adaptive number is 0.75, the noise threshold is 0.001, and the minimum sample is 16-20. Generally speaking, with this setting, there will be no noise in your image, but sometimes there will still be noise after doing this.
The places checked in the red box are the key points:
You can effectively avoid this by checking the first and second options on the right.
6,Ambient occlusion (AO) can produce dark shadows where the model structure changes. The more complex the structure, the more dark shadows will be generated. The more (in the form of lines), the larger the value, the more solid the shadow, and the smaller the value, the fainter the shadow.
Solution:
1) Press F10 to open the rendering settings panel and find GI.
2) Check the ambient occlusion (AO) and adjust the value to 0.8.
3) Adjust the radius to 30. ④ Adjust the subdivision to 30.
The specific parameters should be adjusted according to your own renderings. After turning on AO, the effect is better and the structure is clearer.
For various rendering problems in 3dmax, it is recommended to use a max plug-inCG MAGICHelp designers simplify daily tedious operations
If you encounter problems during the operation, you can directly perform a one-click physical examination. CG MAGIC supports comprehensive physical examinations in all scenes. Abnormal problems can be intuitively known and repaired and optimized with one click, solving various problems such as slow rendering and Max crash.
