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Does anyone want to make a quick control for the texture-changing control? I don't use any model-editing programs. Copying from the texture-changing guide:
The color-changing control lets you feed color channels into other channels, so you could turn a red dress with small green patches (we see dresses like this all the time) into a green dress with small red patches.
This is like a hue-changing tool in an image editor, except that you have to do all the work of finding out what numbers to use to get a different color!
The controls can be set up as accessories or pmx bones. They will look a lot cooler if you can interpolate between frames. This is possible for accessory position if you attach them to bones, but not for accessory rotation (without extra work to calculate parent's rotation, and I'm lazy). Since accessory rotation is used for the 'low' values, accessories are still fine if you only use the 'high' values.
Setting up the controls to cause no change:
Red control: position 10, 0, 0
Green control: position 0, 10, 0
Blue control: position 0, 0, 10
Now, attach them to a dummy bone at the origin.
Move a second dummy bone to around 5, 5, 5. You can rotate it a bit so it's oriented in a nice direction for single-axis rotation before the next step. (Make sure to register it.)
Go to first dummy bone, select the bone at the origin, and go to Outside Parent (OP) at the bottom-left. Change parent to the second bone, register it as outside parent, and click Register Frame before closing the menu. (If you close the menu without registering the frame, the position updates based on the OP. Sometimes you want this, but in this case we want it to stay at the same place.)
Result: all the controls are at the same position, but they will now rotate around a bone you put at 5, 5, 5. Try rotating that bone to get different colors.
If you have basic modeling skills, you could create a dummy pmx object with bones at the right places to use as controls for this.