Not intensely modifying, just using the commands to change tree/grass/fauna quality. The issue resolves when I restart but it happens again within 20 minutes of building sometimes.

This was the last error log I had when it happened. Though it didn't crash because of this error, it crashed when I tried modifying the graphics settings too quickly to try and resolve the problem.

Code:

Uncaught exception from thread:Thread[LWJGL Renderer Thread,5,main]
java.lang.IllegalStateException: Framebuffer has erronous attachment.
	at com.jme3.renderer.lwjgl.LwjglRenderer.checkFrameBufferError(LwjglRenderer.java:1324)
	at com.jme3.renderer.lwjgl.LwjglRenderer.setFrameBuffer(LwjglRenderer.java:1598)
	at com.jme3.renderer.RenderManager.renderViewPort(RenderManager.java:1108)
	at com.jme3.renderer.RenderManager.render(RenderManager.java:1173)
	at com.jme3.app.SimpleApplication.update(SimpleApplication.java:254)
	at com.jme3.system.lwjgl.LwjglAbstractDisplay.runLoop(LwjglAbstractDisplay.java:149)
	at com.jme3.system.lwjgl.LwjglDisplay.runLoop(LwjglDisplay.java:182)
	at com.jme3.system.lwjgl.LwjglAbstractDisplay.run(LwjglAbstractDisplay.java:223)
	at java.lang.Thread.run(Unknown Source)

Build version:20120627

Memory usage:
Working memory: 77% (346001880/448823296)  VM Max: 66% (346001880/518979584)

Rendering caps:
    FrameBuffer
    FrameBufferMRT
    FrameBufferMultisample
    OpenGL20
    OpenGL21
    OpenGL30
    OpenGL31
    ARBprogram
    GLSL100
    GLSL110
    GLSL120
    GLSL130
    GLSL140
    VertexTextureFetch
    TextureArray
    FloatTexture
    FloatColorBuffer
    FloatDepthBuffer
    PackedFloatTexture
    SharedExponentTexture
    PackedFloatColorBuffer
    NonPowerOfTwoTextures
    MeshInstancing
    VertexBufferArray

Statistics:
  Vertices = 0
  Triangles = 0
  Uniforms = 0
  Objects = 0
  Shaders (S) = 0
  Shaders (F) = 0
  Shaders (M) = 27
  Textures (S) = 2
  Textures (F) = 2
  Textures (M) = 92
  FrameBuffers (S) = 0
  FrameBuffers (F) = 1
  FrameBuffers (M) = 5
Application settings:
UseInput = true
AudioRenderer = LWJGL
Height = 1080
Renderer = LWJGL-OpenGL2
BitsPerPixel = 32
Fullscreen = true
StencilBits = 0
DepthBits = 24
VSync = false
Frequency = 60
Width = 1920
Samples = 0
DisableJoysticks = true
FrameRate = -1

Display adapter information:
Adapter:igdumd64
Driver Version:null
Vendor:Intel
Version:3.1.0 - Build 9.17.10.3347
Renderer:Intel(R) HD Graphics 3000
GLSL Ver:1.40 - Intel Build 9.17.10.3347

After I've been playing for a while, especially when building something big or clearing a lot of land, the terrain starts to bug and I can see through the ground all the way to the bottom of the world. I'll try and screenshot it next time it happens so the description is clearer. It's like when you would get stuck somewhere in an old N64 game you weren't supposed to be and you could see behind the wall to where nothing existed. Anyway, I'll try and screencapture it next time. But has anyone experienced something similar? How can I fix that?

Hm. I did that but it doesn't seem to have had any effect. The console doesn't recognize the commands.

Thanks! I tried putting the groovy file in each of those folders listed in the topic. Nothing seemed to do the trick. Is there an unpacking of the groovy file I need to do first?

Can I only use this on a server or can I use it in single player? If so, where do I put the script?

I'm new. I've been searching the forum for this but can't find it -- so probably a dumb question. How do I scale objects down so they aren't giant? I made a book but it's way too big.

Thanks!