MCreator won't let me choose red sand

Works as designed
Not applicable
Issue description

mcreator won't let me choose red sand for the top block in a custom biome, it defaults to only yellow sand and i can't change it in code either... 

the same thing happens with blocks with more than one type such as logs, wool, carpet etc.

gradle log

C:\Pylo\MCreator178\forge\build\sources\main\java\mod\mcreator\ error: cannot find symbol
            topBlock = Blocks.RED_SAND.getDefaultState();
  symbol:   variable RED_SAND
  location: class Blocks
Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
1 error

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':compileJava'.
> Compilation failed; see the compiler error output for details.

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

Issue comments

Right now, you can't spawn blocks with metadata in biome in MCreator. We will improve this in the future.

The code you provided was changed by you and we can't offer support for custom coding.

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