Tutorial: Scaling the texture image beyond the limits of Inventor Studio

Autodesk Inventor allows you to scale a texture image up to 400% of the original size. What if you need a larger one?
Here's how to get a texture larger than the 400% and still keep the file size small.

Tools:
Inventor (of course)
Image editing software - for this example I will use Paint Shop Pro (PSP).

Image Editing Steps

  1. Using PSP, open the texture file you want to enlarge.

  1. For this tutorial we will use the image Pattern_5.bmp found in the ../Textures/surfaces directory (above).
  2. Activate the Resize command. Menu Image > Resize. Or, shortcut Shift+S
  3. In the resize dialog, check the radio button Actual / print size.
    Note: the Resolution is 127.4 pixels/inch.

    Make sure the aspect ratio is 1:1

  4. Change the Resolution to 64 pixels/inch and click OK.

  5. In the menu click File > Save As,  use the name Pattern_5_64dpi.bmp or something you will recognize in the future.
    That is all it takes to increase the physical size of the image. 

  6. Don't close the image yet, we're not done.

While we're at it... let's make a bump map

  1. Hold down the CTRL key and press A, C, V.  (CTRL+A = Select all on layer, Ctrl+C = Copy, and Ctrl+V = Paste) Note: if this were a multi-layered image, only the active layer would be selected using this method.

  2. In the menu Colors, click Negative Image to invert the colors.

  3. In the menu Colors > Adjust  click Brightness/Contrast...

  4. Set Brightness to 100 and Contrast to 0. Click OK
    .

  5. Save the image as Pattern_5x64dpi_bump.bmp in the bumpmaps directory.

Now you've got a bump map that matches your image. Try experimenting with various color depths from dark to light and see the effect it has on the rendered image.

Applying the image to a surface style

  1. Create a surface style using the Pattern_5.bmp texture and bump images.

  2. Create a copy of that surface style, giving it a new name Pattern_5_64dpi.

  3. On the Texture tab, specify the new image you created - Pattern_5_64dpi.bmp. Similar to the process  in Step 1 of this section.

  4. On the Bump tab, specify the bump image you created - Pattern_5_64dpi_bump.bmp

  5. Create a block, 1 inch square.

  6. Place two instances of the block in an assembly and assign each one of the patterns.

    I used the XZ Reflective Ground Plane with a -0.500 in offset, Light Style: Pleasant, and rendered the current camera. You can see that the image we created covers the same cube, but at a larger scale (2X of the original). So, go on and  experiment! See what kind of results you get!!